What can I do with a biochemistry degree? | Prospects.ac.uk

A biochemistry degree opens up a range of highly-skilled careers that incorporate aspects of both biology and medicine

Jobs directly related to your degree include:

Jobs where your degree would be useful include:

Remember that many employers accept applications from graduates with any degree subject, so don't restrict your thinking to the jobs listed here.

Take a few minutes to answer the Job Match quiz and find out what careers would suit you

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The practical and technical skills you develop during your biochemistry degree - through laboratory-based work and your final year research project - prepare you well for a research or technical position. Obtaining some work experience, for example a summer internship in a research laboratory or company, will help to boost your chances of finding a job.

Some universities provide a four-year undergraduate course that includes an industry/research placement year. This is usually undertaken in the pharmaceutical or biotechnical industries or a research institute. Opportunities also exist to take a placement abroad, expanding your career prospects. Work placements help develop key skills further and provide opportunities for building contacts and networking.

Whatever your career plans it is important to enhance your degree with extra skills and experiences, which show that you are a proactive person engaging with the world around you.

The main employers of biochemistry graduates in the public sector are:

Opportunities exist in government laboratories such as the Food & Environment Research Agency (FERA) and public health laboratories such as Public Health England.

Biochemistry graduates are also employed in industry. Typical employers include pharmaceutical, biotechnology, food, water and agricultural companies. Small companies employ biochemists to provide specialist services, such as toxicological studies.

Other employers include scientific and medical publishers and the Intellectual Property Office (as patent examiners).

Find information on employers in science and pharmaceuticals, healthcare, teaching and education and other job sectors.

During your degree you develop specific skills associated with biochemistry, such as:

Other general skills include:

You can demonstrate your experience in these areas by giving examples from the practical work and group projects included in your degree course.

It is common for biochemists to continue their higher education if they are intending to develop a career in the biosciences. A PhD is essential for academic research or to secure a career as an academic lecturer. Even for those entering research in industry or associated careers such as publishing, science communication or clinical careers, further qualifications are an asset and increasingly essential.

If you are aiming for a career path away from science, for example in teaching, law, finance or other non-scientific careers, consider what kind of professional qualifications may stand you in good stead for getting into your chosen career. With a biochemistry degree you can also apply for graduate entry to medicine, dentistry and veterinary science.

For more information on further study and to find a course that interest you, see Masters degrees and search postgraduate courses.

A fifth of graduates are working in the UK either as biochemists, medical scientists or laboratory technicians.

More than a third of graduates go on to further study, a tenth of whom are studying towards clinical medicine.

Find out what other science graduates are doing six months after finishing their degrees in What Do Graduates Do?

Graduate destinations data from the Higher Education Statistics Agency.

graduate job

graduate job

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Home | Tucson Neuroscience Research – Clinical Research …

Then youve come to the right place

Tucson Neuroscience Research specializes in conducting clinical research studies (also called clinical trials) to test possible treatments for medical conditions. With many decades of collective staff experience, we are one of Arizonas premier independent clinical research centers.

Have you thought about participating in a clinical research study?

We are currently recruiting volunteers within the greater Tucsonarea for several ongoing studies. Study volunteers help us to gather important information in the development of future treatments that might manage, cure, or even prevent diseases.

If you are selected to join one of our studies, you will have continuous medical supervision for the entire time you are using the study medication or treatment. All examinations, tests, and medications or treatments are provided to you at no cost.

Contact us to see if you qualify

As a volunteer, your participation in a clinical trial not only helps provide valuable information about your medical condition, but can help many others as well.

To get started, please visit us at 6567 East Carondelet Drive, Ste. 305, Tucson, Arizona 85710. You can also complete and submit a volunteer sign-up formto begin the process. Our screening staff will be happy to answer any questions you might have about the process.

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Psychology and Human Behavior – Study.com

Psychology programs explore the human mind and provide understanding of human behaviors, reactions, actions, emotions and attitudes. Continue reading to determine if psychology and human behavior is the right field for you.

Many students are drawn to education and careers in psychology and human behavior because of the field's broad scope and its many applications. Psychology programs are available at the undergraduate and graduate levels of study. Students may specialize in a branch of the field, such as clinical, counseling, neuroscience or school psychology. This can narrow the type of psychology that graduates practice and their potential work settings.

Whether you're looking for more information about degree options, the careers you can pursue in psychology or specific specializations, Study.com has the resources you need to determine if this field is right for you.

According to the U.S. Bureau of Labor Statistics (BLS), a doctoral degree is required for employment as an independent, licensed clinical or counseling psychologist (www.bls.gov). A bachelor's or a master's degree can lead to other positions, such as youth worker, social services aide, caseworker or substance abuse counselor. Depending on the state and work setting, these professionals may also be required to obtain licensure.

Psychology programs can lead to associate's, bachelor's, master's or doctoral degrees. The following pages can help you decide which educational path is right for you.

As with many fields of study, there are numerous distance learning opportunities in psychology. Explore the following pages to learn about a selection of online psychology classes, including some free learning opportunities, and online degree programs. Keep in mind that some distance learning opportunities in psychology may have certain in-person requirements.

Psychology has many branches and specializations, including those outlined below. These specializations can prepare you for a specific career in psychology and provide an additional glimpse into a certain part of the human mind. Explore the following pages to learn more.

To become a licensed psychologist or to pursue other careers in psychology, certification is occasionally necessary. The following Study.com pages provide some information about certification requirements for a small sample of psychology careers.

The following careers are a small sample of what you can do with a degree in psychology.

Employment of psychologists overall was expected to increase roughly 12% from 2012-2022, according to the BLS, which is about average. Earnings for these professionals relied on specialty; the median annual wage for industrial and organizational psychologists was $80,330 in May 2013, while counseling, clinical and school psychologists made $67,760.

Related careers are also expected to see an increase in employment from 2012-2022; the BLS anticipated jobs for substance abuse and behavioral disorder counselors to grow by 31% during this time. Meanwhile, employment of social workers was expected to increase by 19%, and jobs for other social and human service assistants were projected to grow 22%.

The BLS also noted that as of May 2013, substance abuse and behavioral disorder counselors made a median annual salary of $38,620, and social and human service assistants made $29,230. At the same time, child, family and school social workers earned a median annual wage of $42,120, while healthcare social workers made $50,820.

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Psychology and Human Behavior - Study.com

Human nature – Wikipedia

Human nature refers to the distinguishing characteristicsincluding ways of thinking, feeling, and actingwhich humans tend to have naturally.[1][2][3][4]

The questions of whether there truly are fixed characteristics, what these natural characteristics are, and what causes them are among the oldest and most important questions in philosophy and science. The science that examines human nature is known as psychology and more recently also neuroscience.[5][6][7][8] The concept of human nature is traditionally contrasted not only with unusual human characteristics, but also with characteristics which are derived from specific cultures, and upbringings. The "nature versus nurture" debate is a well-known modern discussion about human nature in the natural science.

These questions have particularly important implications in economics, ethics, politics, and theology. This is partly because human nature can be regarded as both a source of norms of conduct or ways of life, as well as presenting obstacles or constraints on living a good life. The complex implications of such questions are also dealt with in art and literature, the question of what it is to be human.

The concept of nature as a standard by which to make judgments is traditionally said to have begun in Greek philosophy, at least as regards the Western and Middle Eastern languages and perspectives which are heavily influenced by it.[9]

The teleological approach of Aristotle came to be dominant by late classical and medieval times. By this account, human nature really causes humans to become what they become, and so it exists somehow independently of individual humans. This in turn has been understood as also showing a special connection between human nature and divinity. This approach understands human nature in terms of final and formal causes. In other words, nature itself (or a nature-creating divinity) has intentions and goals, similar somehow to human intentions and goals, and one of those goals is humanity living naturally. Such understandings of human nature see this nature as an "idea", or "form" of a human.[10]

However, the existence of this invariable and metaphysical human nature is a subject of much historical debate, continuing into modern times. Against this idea of a fixed human nature, the relative malleability of man has been argued especially strongly in recent centuriesfirstly by early modernists such as Thomas Hobbes and Jean-Jacques Rousseau. In Rousseau's Emile, or On Education, Rousseau wrote: "We do not know what our nature permits us to be".[11] Since the early 19th century, thinkers such as Hegel, Marx, Kierkegaard, Nietzsche, Sartre, structuralists, and postmodernists have also sometimes argued against a fixed or innate human nature.

Charles Darwin's theory of evolution has changed the nature of the discussion, supporting the proposition that mankind's ancestors were not like mankind today. Still more recent scientific perspectivessuch as behaviorism, determinism, and the chemical model within modern psychiatry and psychologyclaim to be neutral regarding human nature. As in much of modern science, such disciplines seek to explain with little or no recourse to metaphysical causation.[12] They can be offered to explain human nature's origins and underlying mechanisms, or to demonstrate capacities for change and diversity which would arguably violate the concept of a fixed human nature.

Philosophy in classical Greece is the ultimate origin[citation needed] of the Western conception of the nature of a thing. According to Aristotle, the philosophical study of human nature itself originated with Socrates, who turned philosophy from study of the heavens to study of the human things.[13] Socrates is said to have studied the question of how a person should best live, but he left no written works. It is clear from the works of his students Plato and Xenophon, and also by what was said about him by Aristotle (Plato's student), that Socrates was a rationalist and believed that the best life and the life most suited to human nature involved reasoning. The Socratic school was the dominant surviving influence in philosophical discussion in the Middle Ages, amongst Islamic, Christian, and Jewish philosophers.

The human soul in the works of Plato and Aristotle has a divided nature, divided in a specifically human way. One part is specifically human and rational, and divided into a part which is rational on its own, and a spirited part which can understand reason. Other parts of the soul are home to desires or passions similar to those found in animals. In both Aristotle and Plato, spiritedness (thumos) is distinguished from the other passions (epithumiai).[14] The proper function of the "rational" was to rule the other parts of the soul, helped by spiritedness. By this account, using one's reason is the best way to live, and philosophers are the highest types of humans.

AristotlePlato's most famous studentmade some of the most famous and influential statements about human nature. In his works, apart from using a similar scheme of a divided human soul, some clear statements about human nature are made:

For Aristotle, reason is not only what is most special about humanity compared to other animals, but it is also what we were meant to achieve at our best. Much of Aristotle's description of human nature is still influential today. However, the particular teleological idea that humans are "meant" or intended to be something has become much less popular in modern times.[18]

For the Socratics, human nature, and all natures, are metaphysical concepts. Aristotle developed the standard presentation of this approach with his theory of four causes. Every living thing exhibits four aspects or "causes": matter, form, effect, and end. For example, an oak tree is made of plant cells (matter), grew from an acorn (effect), exhibits the nature of oak trees (form), and grows into a fully mature oak tree (end). Human nature is an example of a formal cause, according to Aristotle. Likewise, to become a fully actualized human being (including fully actualizing the mind) is our end. Aristotle (Nicomachean Ethics, Book X) suggests that the human intellect () is "smallest in bulk" but the most significant part of the human psyche, and should be cultivated above all else. The cultivation of learning and intellectual growth of the philosopher, which is thereby also the happiest and least painful life.

Human nature is a central question in Chinese philosophy.[19] Human nature was considered by Confucius and Mencius to be essentially good.[19] From the Song dynasty the theory of the original goodness of human beings dominated Confucian thought.[20] However, Hsun Tzu taught that human nature was essentially evil.[19] As suggested by these contrasting views, the question of human nature has generated a long debate among Chinese thinkers.[20]

In Christian theology, there are two ways of "conceiving human nature". The first is "spiritual, Biblical, and theistic", whereas the second is "natural, cosmical, and anti-theistic".[21] The focus in this section is on the former. As William James put it in his study of human nature from a religious perspective, "religion" has a "department of human nature".[22]

Various views of human nature have been held by theologians. However, there are some "basic assertions" in all "biblical anthropology".[23]

The Bible contains no single "doctrine of human nature". Rather, it provides material for more philosophical descriptions of human nature.[24] For example, Creation as found in the Book of Genesis provides a theory on human nature.[25]

Catechism of the Catholic Church[26] in chapter "Dignity of the human person" has article about man as image of God, vocation to beatitude, freedom, human acts, passions, moral conscience, virtues and sin.

As originally created, the Bible describes "two elements" in human nature: "the body and the breath or spirit of life breathed into it by God". By this was created a "living soul", that is, a "living person".[27] According to Genesis 1:27, this living person was made in the "image of God".[28] From the biblical perspective, "to be human is to bear the image of God".[29]

Genesis does not elaborate the meaning of "the image of God", but scholars find suggestions. One is that being created in the image of God distinguishes human nature from that of the beasts.[30] Another is that as God is "able to make decisions and rule" so humans made in God's image are "able to make decisions and rule". A third is that mankind possesses an inherent ability "to set goals" and move toward them.[31] That God denoted creation as "good" suggests that Adam was "created in the image of God, in righteousness."[32]

Adam was created with ability to make "right choices", but also with the ability to choose sin, by which he fell from righteousness into a state of "sin and depravity".[33] Thus, according to the Bible, "humankind is not as God created it".[34]

By Adam's fall into sin, "human nature" became "corrupt", although it retains the image of God. Both the Old Testament and the New Testament teach that "sin is universal".[35] For example, Psalm 51:5 reads: "For behold I was conceived in iniquities; and in sins did my mother conceive me."[36] Jesus taught that everyone is a "sinner naturally" because it is mankind's "nature and disposition to sin".[37] Paul, in Romans 7:18, speaks of his "sinful nature".[38]

Such a "recognition that there is something wrong with the moral nature of man is found in all religions".[39] Augustine of Hippo coined a term for the assessment that all humans are born sinful: original sin.[40] Original sin is "the tendency to sin innate in all human beings".[41] The doctrine of original sin is held by the Catholic Church and most mainstream Protestant denominations, but rejected by the Eastern Orthodox Church, which holds the similar doctrine of ancestral fault.

"The corruption of original sin extends to every aspect of human nature": to "reason and will" as well as to "appetites and impulses". This condition is sometimes called "total depravity".[42] Total depravity does not mean that humanity is as "thoroughly depraved" as it could become.[43] Commenting on Romans 2:14, John Calvin writes that all people have "some notions of justice and rectitude ... which are implanted by nature" all people.[44]

Adam embodied the "whole of human nature" so when Adam sinned "all of human nature sinned".[45] The Old Testament does not explicitly link the "corruption of human nature" to Adam's sin. However, the "universality of sin" implies a link to Adam. In the New Testament, Paul concurs with the "universality of sin". He also makes explicit what the Old Testament implied: the link between humanity's "sinful nature" and Adam's sin[46] In Romans 5:19, Paul writes, "through [Adam's] disobedience humanity became sinful".[47] Paul also applied humanity's sinful nature to himself: "there is nothing good in my sinful nature."[48][49]

The theological "doctrine of original sin" as an inherent element of human nature is not based only on the Bible. It is in part a "generalization from obvious facts" open to empirical observation.[50]

A number of experts on human nature have described the manifestations of original (i.e., the innate tendency to) sin as empirical facts.

Empirical discussion questioning the genetic exclusivity of such an intrinsic badness proposition is presented by researchers Elliott Sober and David Sloan Wilson. In their book, Unto Others: The Evolution and Psychology of Unselfish Behavior, they propose a theory of multilevel group selection in support of an inherent genetic "altruism" in opposition to the original sin exclusivity for human nature. [57]

Liberal theologians in the early 20th century described human nature as "basically good" needing only "proper training and education". But the above examples document the return to a "more realistic view" of human nature "as basically sinful and self-centered". Human nature needs "to be regenerated ... to be able to live the unselfish life".[58]

According to the Bible, "Adam's disobedience corrupted human nature" but God mercifully "regenerates".[59] "Regeneration is a radical change" that involves a "renewal of our [human] nature".[60] Thus, to counter original sin, Christianity purposes "a complete transformation of individuals" by Christ.[61]

The goal of Christ's coming is that fallen humanity might be "conformed to or transformed into the image of Christ who is the perfect image of God", as in 2 Corinthians 4:4.[62] The New Testament makes clear the "universal need" for regeneration.[63] A sampling of biblical portrayals of regenerating human nature and the behavioral results follow.

One of the defining changes that occurred at the end of the Middle Ages was the end of the dominance of Aristotelian philosophy, and its replacement by a new approach to the study of nature, including human nature.[citation needed] In this approach, all attempts at conjecture about formal and final causes were rejected as useless speculation.[citation needed] Also, the term "law of nature" now applied to any regular and predictable pattern in nature, not literally a law made by a divine lawmaker, and, in the same way, "human nature" became not a special metaphysical cause, but simply whatever can be said to be typical tendencies of humans.[citation needed]

Although this new realism applied to the study of human life from the beginningfor example, in Machiavelli's worksthe definitive argument for the final rejection of Aristotle was associated especially with Francis Bacon. Bacon sometimes wrote as if he accepted the traditional four causes ("It is a correct position that "true knowledge is knowledge by causes". And causes again are not improperly distributed into four kinds: the material, the formal, the efficient, and the final") but he adapted these terms and rejected one of the three:

But of these the final cause rather corrupts than advances the sciences, except such as have to do with human action. The discovery of the formal is despaired of. The efficient and the material (as they are investigated and received, that is, as remote causes, without reference to the latent process leading to the form) are but slight and superficial, and contribute little, if anything, to true and active science.[68]

This line of thinking continued with Ren Descartes, whose new approach returned philosophy or science to its pre-Socratic focus upon non-human things. Thomas Hobbes, then Giambattista Vico, and David Hume all claimed to be the first to properly use a modern Baconian scientific approach to human things.

Hobbes famously followed Descartes in describing humanity as matter in motion, just like machines. He also very influentially described man's natural state (without science and artifice) as one where life would be "solitary, poor, nasty, brutish and short".[69] Following him, John Locke's philosophy of empiricism also saw human nature as a tabula rasa. In this view, the mind is at birth a "blank slate" without rules, so data are added, and rules for processing them are formed solely by our sensory experiences.[70]

Jean-Jacques Rousseau pushed the approach of Hobbes to an extreme and criticized it at the same time. He was a contemporary and acquaintance of Hume, writing before the French Revolution and long before Darwin and Freud. He shocked Western civilization with his Second Discourse by proposing that humans had once been solitary animals, without reason or language or communities, and had developed these things due to accidents of pre-history. (This proposal was also less famously made by Giambattista Vico.) In other words, Rousseau argued that human nature was not only not fixed, but not even approximately fixed compared to what had been assumed before him. Humans are political, and rational, and have language now, but originally they had none of these things.[71] This in turn implied that living under the management of human reason might not be a happy way to live at all, and perhaps there is no ideal way to live. Rousseau is also unusual in the extent to which he took the approach of Hobbes, asserting that primitive humans were not even naturally social. A civilized human is therefore not only imbalanced and unhappy because of the mismatch between civilized life and human nature, but unlike Hobbes, Rousseau also became well known for the suggestion that primitive humans had been happier, "noble savages".[72]

Rousseau's conception of human nature has been seen as the origin of many intellectual and political developments of the 19th and 20th centuries.[73] He was an important influence upon Kant, Hegel, and Marx, and the development of German idealism, historicism, and romanticism.

What human nature did entail, according to Rousseau and the other modernists of the 17th and 18th centuries, were animal-like passions that led humanity to develop language and reasoning, and more complex communities (or communities of any kind, according to Rousseau).

In contrast to Rousseau, David Hume was a critic of the oversimplifying and systematic approach of Hobbes, Rousseau, and some others whereby, for example, all human nature is assumed to be driven by variations of selfishness. Influenced by Hutcheson and Shaftesbury, he argued against oversimplification. On the one hand, he accepted that, for many political and economic subjects, people could be assumed to be driven by such simple selfishness, and he also wrote of some of the more social aspects of "human nature" as something which could be destroyed, for example if people did not associate in just societies. On the other hand, he rejected what he called the "paradox of the sceptics", saying that no politician could have invented words like "'honourable' and 'shameful,' 'lovely' and 'odious,' 'noble' and 'despicable'", unless there was not some natural "original constitution of the mind".[74]

Humelike Rousseauwas controversial in his own time for his modernist approach, following the example of Bacon and Hobbes, of avoiding consideration of metaphysical explanations for any type of cause and effect. He was accused of being an atheist. He wrote:

We needn't push our researches so far as to ask "Why do we have humanity, i.e. a fellow-feeling with others?" It's enough that we experience this as a force in human nature. Our examination of causes must stop somewhere.[74]

After Rousseau and Hume, the nature of philosophy and science changed, branching into different disciplines and approaches, and the study of human nature changed accordingly. Rousseau's proposal that human nature is malleable became a major influence upon international revolutionary movements of various kinds, while Hume's approach has been more typical in Anglo-Saxon countries, including the United States.[citation needed]

[relevant? discuss]

As the sciences concerned with humanity split up into more specialized branches, many of the key figures of this evolution expressed influential understandings about human nature.[citation needed]

Charles Darwin gave a widely accepted scientific argument for what Rousseau had already argued from a different direction, that humans and other animal species have no truly fixed nature, at least in the very long term. However, he also gave modern biology a new way of understanding how human nature does exist in a normal human time-frame, and how it is caused.[citation needed]

E. O. Wilson's sociobiology and closely related theory of evolutionary psychology give scientific arguments against the "tabula rasa" hypotheses of Hobbes, Locke, and Rousseau. In his book Consilience: The Unity of Knowledge (1998), Wilson claimed that it was time for a cooperation of all the sciences to explore human nature. He defined human nature as a collection of epigenetic rules: the genetic patterns of mental development. Cultural phenomena, rituals, etc. are products, not part of human nature. Until now, these phenomena were only part of psychological, sociological, and anthropological studies. Wilson proposes that they can be part of interdisciplinary research.

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Human nature - Wikipedia

Computers in Human Behavior – Journal – Elsevier

This journal has partnered with Heliyon, an open access journal from Elsevier publishing quality peer reviewed research across all disciplines. Heliyons team of experts provides editorial excellence, fast publication, and high visibility for your paper. Authors can quickly and easily transfer their research from a Partner Journal to Heliyon without the need to edit, reformat or resubmit.>Learn more at Heliyon.com

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3 Ways The Environment Shapes Human Behavior – Mutual …

Many scientific researches have shown an obvious fact, that the behavior of a human being is created by the environment. If genes predispose a certain behavior but the environment doesnt support it, then that behavior wont manifest, so in this case, genes arent important.

TROMNarrator

The section ENVIRONMENT in the documentaryTROM (The Reality Of Me)shows how the environment shapes human beings behaviors via:

Dr. Gregory Forbes, recorded at TEDGlobal 2010:

We live in a remarkable time the age of genomics. Your genome is the entire sequence of your DNA. Your sequence and mine are slightly different. Thats why we look different. Ive got brown eyes you might have blue, or gray; but its not just skin-deep.

The headlines tell us that genes can give us scary diseases, maybe even shape our personality, or give us mental disorders. Our genes seem to have awesome power over our destinies, and yet, I would like to think that I am more than my genes.

Likewise, every connectome changes over time.

Its true; to some extent, they are programmed by your genes. But thats not the whole story, because there are signals: electrical signals, that travel along the branches of neurons, and chemical signals, that jump across from branch to branch. These signals are called neural activity. And theres a lot of evidence that neural activity is encoding our thoughts, feelings, and perceptions, our mental experiences. And theres a lot of evidence that neural activity can cause your connections to change.

If you put those two facts together, it means that your experiences can change your connectome. And thats why every connectome is unique, even those of genetically identical twins. The connectome is where nature meets nurture. And it might be true that just the mere act of thinking can change your connectome; an idea that you may find empowering.

Think about the way you act, your facial expression, the values accepted by you, the way you talk, everything, and remember that they are a result of your environment.

TROMNarrator

Male & Female Behaviors That Result From Environmental Conditioning

Louann Brizendine, neuropsychiatrist and author ofThe Female Brain(2006) andThe Male Brain(2010), recorded at Dominican University of California, March 31, 2010

The nature nurture debate is dead for the following reason: the brain is very, very malleable.

Were all born with male or female predispositions, and then well have hormones that increase that circuitry for behavior, which is what a hormone is supposed to do. A hormones job is to make us predisposed to certain behaviors.

However, the way were raised, for example, little boys: Studies have shown that little boys who were told theyre not supposed to touch something, they often will grab it and touch it, whereas a little girl can be given a verbal demand not to touch it.

Little boys worldwide are punished more frequently for transgressions. Little boys are told not to cry, that theyre supposed to man-up, right? Even at a young age, dads sometimes are very, very scared if their little boy is showing any version of effeminate behaviors.

For example, I remember flying coast to coast with a guy who sat next to me. He said his 18 month old son, when he saw his 4 year old sister open a present earlier that week, which was a purse, he said, Oh, can I have a purse too? And he said he found himself, like someone had kicked him in the stomach, and he just yelled at his eighteen month old son, No, boys dont have purses! He was reporting to me this event, and he felt so ashamed and embarrassed afterwards, because he realized that his little boy wasnt expressing anything about being effeminate or not.

So the way we raise little boys, and we raise little girls, our brain circuits are so malleable. For example, we werent born learning to play the piano, right? You do practice, practice, practice.

You can retrain brain circuits, to do a variety of things. All of our life, we are trained, gender trained, to be more one way or the other.

Males: facial expressions for example, when they measure them and put electrodes on them, and show them a grizzly photograph that is supposed to make you cringe and emotional, their facial expressions, versus females, actually showed more emotional response in the time before it becomes conscious. Then right after the one second level when it becomes conscious, their facial muscles start to freeze down for frowning or smiling. In females, facial muscles actually amplify, and the males go down. Scientists believe, the hypothesis is, that the males have been trained to suppress an emotional feeling.

There is no such thing as: bad, criminal, lazy, brilliant people, thieves or racists. Only people predisposed to such behavior. But if the environment doesnt trigger them, the behavior never manifests.

TROMNarrator

Children Who Lived Isolated From Human Contact From A Very Young Age

The most extreme case is represented by feral children. A feral child is a human child who has lived isolated from human contact from a very young age, and has no (or little) experience of human care, loving or social behavior, and, crucially, of human language.

Feral children lack the basic social skills which are normally learned in the process of enculturation. For example, they may be unable to learn to use a toilet, have trouble learning to walk upright and display a complete lack of interest in human activity around them.

Oxana Malaya began her life living with dogs, rejected by her mother and father. She somehow survived for six years, living wild, before being taken into care. There are few cases of feral children whove been able to fully compensate for the neglect theyve suffered.

Oxana is now 22, but her future still hangs in the balance. Have scientists learned enough from previous cases to rehabilitate?

For six years, Oxana Malaya spent her life, living in a kennel, with dogs. Totally abandoned by her mother and father, she was discovered, behaving more like an animal, than a human child.

For two centuries, wild children have been the object of fascinating study. Raised without love, or social interaction, wild (or feral) children pose the question: What is it that makes us human?

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3 Ways The Environment Shapes Human Behavior - Mutual ...

Territorial Behavior Among Human Beings | Hunger For Culture

March 7, 1975

AIM AND INTRODUCTION:

The aim of the practical was to observe territorial behavior among human beings and explore it in relation to animals in the comparative psychological perspective. The general definition of a territory is a defended area. It has to be defended through actual aggression or the threat of it. Territoriality has been observed to exist among certain animal species like birds, insects, mammals and vertebrates. Therefore, a parallel with man has had to be established because territoriality has been seen to exist in man; both as an individual and a group.

The major characteristic of territoriality as observed by comparative psychologists like Lorenz, Tinbergen, and ethnologists like Eibl-Ebesfeldt, is that an animal must be aggressive towards conspecifics. Through studies and observations, the authors have come to the conclusion that the territorial behavior possesses several functions in the evolution and preservation of species. In general it has been suggested that territoriality saves the purposes of distributing or spreading the animals over a large area resulting in the proper utilization of feeding resources, to enable safe and undisturbed reproductive behavior, for example, territoriality in birds ensures that they do not build nests too close together. And a last function of territoriality is said to be reduction of aggression in the animal species which have a high level of it.

SUBJECTS: The subjects consisted of the University of Zambia students who read in the University library. Eight subjects were observed.

MATERIALS: The apparatus used in the experiment consisted of a pen and paper for recording the sitting arrangements and signs of territorial behavior of the subjects.

PROCEDURE: O represents Observer

S represents Subject

Initially, O goes into the library and sits on one of the tables. He notes sitting arrangements of Ss, spacing and objects which are possibly used for marking Ss territory. After a while, O moves to a table which has almost all the seats full and sits next to S and notes the reaction of S; moving chair, objects etc.

Then especially during a different time when there are many empty seats; 12 to 13 hours when many subjects go for lunch, O sits next or adjacent to a subject and notes his reaction.

RESULTS: The tables are made out of a combination of several smaller tables which provide a comfortable space for writing and reading for an individual student.

When a student sits down, he normally or always defines his territory by placing his books all over the rectangular spacing. This was confirmed in all the observations I made when the books are placed in this way, no other student can sit on the chair to read even if the owner of the territory goes away for a long time.

On 31st December 1974 at 9 hours, I was seated on a desk in the reference deck. Six students got their writing pads and apparently went away to attend class lectures. While they were away, three students came looking for a table where they could read. Each one of them came, looked around and went away to another deck. Despite the fact that the owners of the books were away, the three could not occupy their desks. From this observation, we can say that objects act as very strong definitions of territory for human beings.

On deck 14 (psychology) 23rd December 1974, I sat down to read beside a female student. Immediately I sat on the chair next to her, she pulled towards her the edges of books which were protruding into my space. This showed that human beings respect and recognize each others territory.

ISOLATED INCIDENTS AND OBSERVATIONS

Students who read in the library regularly, at least every day, tend to have a specific chair and table where they read from every day. It is as if they say; This is my space, I own it.

***************

On 14th February 1975, a Zambian female student stopped reading at 17 hours. She piled her books on the table, expecting to return and resume reading after supper. When she returned, the table was occupied by three Asian students. Her books had been moved to the middle of the table where it was difficult to determine whether she had previously sat on one of the chairs. With a hissing whisper, she asked one of the students whether he had moved the books. The student denied it. There was a hushed argument pointing of fingers; then the Asian male student rose violently but was held by the other two. At this point, the female student angrily got her books and walked out.

***************

During the first week of the beginning of my second year, I went into the library on the sociology deck. I put my books on one of the tables, sat and wrote for a while. Then I went to look for a book on the shelves. A first year male student arrived; he pushed aside my books and sat down to read. I was very angry. I went there and stared at him for a few seconds and hissed; You dont push away books when someone is already sitting there! I walked away and he seemed amazed. Apparently, he was not yet acquainted with the informal rules about marking ones space in the library.

DISCUSSION

The few observations made seem to confirm that people display territoriality although it lacks overt aggression as is the case with animals.

What purpose, if any, does territoriality save for the human being in such a place like the library? Biological functions are not very evident. People do not mate or show overt courtship behavior in the library and they do not obtain their food from it. Therefore, the only plausible explanation for man to display territoriality in places like the library, is that it is one of those behaviors which have lost their specific evolutionary functions and their remnants are perhaps in the process of degenerating into ritual behavior; i.e. it will no longer save its original biological function.

But one of the functions it could be still saving is to distribute or rather spread the readers over all the available space in the library. Presumably, man feels uncomfortable having limited breathing and elbow movements, when they are too close together.

Territoriality, the one displayed in libraries in particular seems to be an innate or inherited tendency. As in most vertebrates, we observe in man distinct territorial behavior. Individuals maintain distinct distances between themselves and others. Children develop a feeling for property. The expression of both tendencies seems to be based on a common mechanism. (Eibl-Ebesfeldt; 1971, P. 444)

The spacing which is induced by territoriality might be important for the propagation of the human species. This is suggested by an experiment in overcrowding in which animals showed serious behavioral pathologies and physiological malfunctioning. Calhoun (1956, 1962) conducted an experiment in which a colony of Norway rats were made to live in an overcrowded pen. Although the rats were allowed to roam in various compartments, they ended up living together in one pen. Calhoun termed this phenomenon pathological togetherness. The rats fertility was lowered and their life span was shortened. Mann sums up by saying; In mice, overcrowding in laboratory cages leads to abnormal sexual behavior, decreased reproductive and nursing capacities, and aborted pregnancies, deficient maternal care for the young and disrupted next building. (Mann, 1969, P. 17)

Although the analogy cannot be applied to the library situation, nevertheless, territoriality in humans in the library could be to the advantage of the species. For example some contagious diseases like sneezing and other more serious diseases are prevented from spreading due to the distances which human beings maintain between each other. The evidence from overcrowding rats could also explain the high incidence of crime and violence which prevails in overcrowded suburbs of cities.

An interesting area of further examination in the library is the observation in animals that Territories have been likened to elastic discs the more they are compressed, the more they resist further compression. (Manning; 1972, P. 99). In the library this could be tested by an observer or experimenter noticing that a table is already filled but puts an extra chair where there is supposed to be none as shown below.

If a chair is for example placed on either X, since the territories are further compressed, would A and B or A and D react with overt aggression? In this respect perhaps ethical values of the individual subjects would come into question. But however, the results would be interesting.

In contrast with the seemingly inhibited aggression in the library human territoriality, I report on the few observations made at Lachnver National Park during a field trip last December. The Kafue Leahwe was observed at the beginning of the establishment of territories. There was a herd of 10,000 Leahwe, females were moving in large herds while males were scattered around in distances of about fifteen meters apart. There was a fight nearly every five minutes. Chessing between males had a very high frequency and they were also constantly digging horns in the ground. In the 10 minutes we spent observing the last herd of about 1,000, six fights were observed between males and the last one lasted up to 10 minutes until a third male had to separate them to end the fight.

REFERENCES

Manning, A. W. G., An introduction to Animal behavior. (1972)

Mann, L. Social Psychology(1969)

Eibl-Ebesfeldt, Ethology(1970)

(The original document was written on March 7, 1975 when the author, now Mwizenge S. Tembo, was a Junior at University of Zambia majoring in Psychology and Sociology)

Observing Territorial Behavior of Human Beings:

Psychology 932 Practical Report By Jacob Tembo

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Territorial Behavior Among Human Beings | Hunger For Culture

genetics | History, Biology, Timeline, & Facts …

Genetics, study of heredity in general and of genes in particular. Genetics forms one of the central pillars of biology and overlaps with many other areas, such as agriculture, medicine, and biotechnology.

Since the dawn of civilization, humankind has recognized the influence of heredity and applied its principles to the improvement of cultivated crops and domestic animals. A Babylonian tablet more than 6,000 years old, for example, shows pedigrees of horses and indicates possible inherited characteristics. Other old carvings show cross-pollination of date palm trees. Most of the mechanisms of heredity, however, remained a mystery until the 19th century, when genetics as a systematic science began.

Genetics arose out of the identification of genes, the fundamental units responsible for heredity. Genetics may be defined as the study of genes at all levels, including the ways in which they act in the cell and the ways in which they are transmitted from parents to offspring. Modern genetics focuses on the chemical substance that genes are made of, called deoxyribonucleic acid, or DNA, and the ways in which it affects the chemical reactions that constitute the living processes within the cell. Gene action depends on interaction with the environment. Green plants, for example, have genes containing the information necessary to synthesize the photosynthetic pigment chlorophyll that gives them their green colour. Chlorophyll is synthesized in an environment containing light because the gene for chlorophyll is expressed only when it interacts with light. If a plant is placed in a dark environment, chlorophyll synthesis stops because the gene is no longer expressed.

Genetics as a scientific discipline stemmed from the work of Gregor Mendel in the middle of the 19th century. Mendel suspected that traits were inherited as discrete units, and, although he knew nothing of the physical or chemical nature of genes at the time, his units became the basis for the development of the present understanding of heredity. All present research in genetics can be traced back to Mendels discovery of the laws governing the inheritance of traits. The word genetics was introduced in 1905 by English biologist William Bateson, who was one of the discoverers of Mendels work and who became a champion of Mendels principles of inheritance.

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heredity

clear in the study of genetics. Both aspects of heredity can be explained by genes, the functional units of heritable material that are found within all living cells. Every member of a species has a set of genes specific to that species. It is this set of genes that provides

Although scientific evidence for patterns of genetic inheritance did not appear until Mendels work, history shows that humankind must have been interested in heredity long before the dawn of civilization. Curiosity must first have been based on human family resemblances, such as similarity in body structure, voice, gait, and gestures. Such notions were instrumental in the establishment of family and royal dynasties. Early nomadic tribes were interested in the qualities of the animals that they herded and domesticated and, undoubtedly, bred selectively. The first human settlements that practiced farming appear to have selected crop plants with favourable qualities. Ancient tomb paintings show racehorse breeding pedigrees containing clear depictions of the inheritance of several distinct physical traits in the horses. Despite this interest, the first recorded speculations on heredity did not exist until the time of the ancient Greeks; some aspects of their ideas are still considered relevant today.

Hippocrates (c. 460c. 375 bce), known as the father of medicine, believed in the inheritance of acquired characteristics, and, to account for this, he devised the hypothesis known as pangenesis. He postulated that all organs of the body of a parent gave off invisible seeds, which were like miniaturized building components and were transmitted during sexual intercourse, reassembling themselves in the mothers womb to form a baby.

Aristotle (384322 bce) emphasized the importance of blood in heredity. He thought that the blood supplied generative material for building all parts of the adult body, and he reasoned that blood was the basis for passing on this generative power to the next generation. In fact, he believed that the males semen was purified blood and that a womans menstrual blood was her equivalent of semen. These male and female contributions united in the womb to produce a baby. The blood contained some type of hereditary essences, but he believed that the baby would develop under the influence of these essences, rather than being built from the essences themselves.

Aristotles ideas about the role of blood in procreation were probably the origin of the still prevalent notion that somehow the blood is involved in heredity. Today people still speak of certain traits as being in the blood and of blood lines and blood ties. The Greek model of inheritance, in which a teeming multitude of substances was invoked, differed from that of the Mendelian model. Mendels idea was that distinct differences between individuals are determined by differences in single yet powerful hereditary factors. These single hereditary factors were identified as genes. Copies of genes are transmitted through sperm and egg and guide the development of the offspring. Genes are also responsible for reproducing the distinct features of both parents that are visible in their children.

In the two millennia between the lives of Aristotle and Mendel, few new ideas were recorded on the nature of heredity. In the 17th and 18th centuries the idea of preformation was introduced. Scientists using the newly developed microscopes imagined that they could see miniature replicas of human beings inside sperm heads. French biologist Jean-Baptiste Lamarck invoked the idea of the inheritance of acquired characters, not as an explanation for heredity but as a model for evolution. He lived at a time when the fixity of species was taken for granted, yet he maintained that this fixity was only found in a constant environment. He enunciated the law of use and disuse, which states that when certain organs become specially developed as a result of some environmental need, then that state of development is hereditary and can be passed on to progeny. He believed that in this way, over many generations, giraffes could arise from deerlike animals that had to keep stretching their necks to reach high leaves on trees.

British naturalist Alfred Russel Wallace originally postulated the theory of evolution by natural selection. However, Charles Darwins observations during his circumnavigation of the globe aboard the HMS Beagle (183136) provided evidence for natural selection and his suggestion that humans and animals shared a common ancestry. Many scientists at the time believed in a hereditary mechanism that was a version of the ancient Greek idea of pangenesis, and Darwins ideas did not appear to fit with the theory of heredity that sprang from the experiments of Mendel.

Before Gregor Mendel, theories for a hereditary mechanism were based largely on logic and speculation, not on experimentation. In his monastery garden, Mendel carried out a large number of cross-pollination experiments between variants of the garden pea, which he obtained as pure-breeding lines. He crossed peas with yellow seeds to those with green seeds and observed that the progeny seeds (the first generation, F1) were all yellow. When the F1 individuals were self-pollinated or crossed among themselves, their progeny (F2) showed a ratio of 3:1 (3/4 yellow and 1/4 green). He deduced that, since the F2 generation contained some green individuals, the determinants of greenness must have been present in the F1 generation, although they were not expressed because yellow is dominant over green. From the precise mathematical 3:1 ratio (of which he found several other examples), he deduced not only the existence of discrete hereditary units (genes) but also that the units were present in pairs in the pea plant and that the pairs separated during gamete formation. Hence, the two original lines of pea plants were proposed to be YY (yellow) and yy (green). The gametes from these were Y and y, thereby producing an F1 generation of Yy that were yellow in colour because of the dominance of Y. In the F1 generation, half the gametes were Y and the other half were y, making the F2 generation produced from random mating 1/4 Yy, 1/2 YY, and 1/4 yy, thus explaining the 3:1 ratio. The forms of the pea colour genes, Y and y, are called alleles.

Mendel also analyzed pure lines that differed in pairs of characters, such as seed colour (yellow versus green) and seed shape (round versus wrinkled). The cross of yellow round seeds with green wrinkled seeds resulted in an F1 generation that were all yellow and round, revealing the dominance of the yellow and round traits. However, the F2 generation produced by self-pollination of F1 plants showed a ratio of 9:3:3:1 (9/16 yellow round, 3/16 yellow wrinkled, 3/16 green round, and 1/16 green wrinkled; note that a 9:3:3:1 ratio is simply two 3:1 ratios combined). From this result and others like it, he deduced the independent assortment of separate gene pairs at gamete formation.

Mendels success can be attributed in part to his classic experimental approach. He chose his experimental organism well and performed many controlled experiments to collect data. From his results, he developed brilliant explanatory hypotheses and went on to test these hypotheses experimentally. Mendels methodology established a prototype for genetics that is still used today for gene discovery and understanding the genetic properties of inheritance.

Mendels genes were only hypothetical entities, factors that could be inferred to exist in order to explain his results. The 20th century saw tremendous strides in the development of the understanding of the nature of genes and how they function. Mendels publications lay unmentioned in the research literature until 1900, when the same conclusions were reached by several other investigators. Then there followed hundreds of papers showing Mendelian inheritance in a wide array of plants and animals, including humans. It seemed that Mendels ideas were of general validity. Many biologists noted that the inheritance of genes closely paralleled the inheritance of chromosomes during nuclear divisions, called meiosis, that occur in the cell divisions just prior to gamete formation.

It seemed that genes were parts of chromosomes. In 1910 this idea was strengthened through the demonstration of parallel inheritance of certain Drosophila (a type of fruit fly) genes on sex-determining chromosomes by American zoologist and geneticist Thomas Hunt Morgan. Morgan and one of his students, Alfred Henry Sturtevant, showed not only that certain genes seemed to be linked on the same chromosome but that the distance between genes on the same chromosome could be calculated by measuring the frequency at which new chromosomal combinations arose (these were proposed to be caused by chromosomal breakage and reunion, also known as crossing over). In 1916 another student of Morgans, Calvin Bridges, used fruit flies with an extra chromosome to prove beyond reasonable doubt that the only way to explain the abnormal inheritance of certain genes was if they were part of the extra chromosome. American geneticist Hermann Joseph Mller showed that new alleles (called mutations) could be produced at high frequencies by treating cells with X-rays, the first demonstration of an environmental mutagenic agent (mutations can also arise spontaneously). In 1931 American botanist Harriet Creighton and American scientist Barbara McClintock demonstrated that new allelic combinations of linked genes were correlated with physically exchanged chromosome parts.

In 1908 British physician Archibald Garrod proposed the important idea that the human disease alkaptonuria, and certain other hereditary diseases, were caused by inborn errors of metabolism, suggesting for the first time that linked genes had molecular action at the cell level. Molecular genetics did not begin in earnest until 1941 when American geneticist George Beadle and American biochemist Edward Tatum showed that the genes they were studying in the fungus Neurospora crassa acted by coding for catalytic proteins called enzymes. Subsequent studies in other organisms extended this idea to show that genes generally code for proteins. Soon afterward, American bacteriologist Oswald Avery, Canadian American geneticist Colin M. MacLeod, and American biologist Maclyn McCarty showed that bacterial genes are made of DNA, a finding that was later extended to all organisms.

A major landmark was attained in 1953 when American geneticist and biophysicist James D. Watson and British biophysicists Francis Crick and Maurice Wilkins devised a double helix model for DNA structure. This model showed that DNA was capable of self-replication by separating its complementary strands and using them as templates for the synthesis of new DNA molecules. Each of the intertwined strands of DNA was proposed to be a chain of chemical groups called nucleotides, of which there were known to be four types. Because proteins are strings of amino acids, it was proposed that a specific nucleotide sequence of DNA could contain a code for an amino acid sequence and hence protein structure. In 1955 American molecular biologist Seymour Benzer, extending earlier studies in Drosophila, showed that the mutant sites within a gene could be mapped in relation to each other. His linear map indicated that the gene itself is a linear structure.

In 1958 the strand-separation method for DNA replication (called the semiconservative method) was demonstrated experimentally for the first time by American molecular biologist Matthew Meselson and American geneticist Franklin W. Stahl. In 1961 Crick and South African biologist Sydney Brenner showed that the genetic code must be read in triplets of nucleotides, called codons. American geneticist Charles Yanofsky showed that the positions of mutant sites within a gene matched perfectly the positions of altered amino acids in the amino acid sequence of the corresponding protein. In 1966 the complete genetic code of all 64 possible triplet coding units (codons), and the specific amino acids they code for, was deduced by American biochemists Marshall Nirenberg and Har Gobind Khorana. Subsequent studies in many organisms showed that the double helical structure of DNA, the mode of its replication, and the genetic code are the same in virtually all organisms, including plants, animals, fungi, bacteria, and viruses. In 1961 French biologist Franois Jacob and French biochemist Jacques Monod established the prototypical model for gene regulation by showing that bacterial genes can be turned on (initiating transcription into RNA and protein synthesis) and off through the binding action of regulatory proteins to a region just upstream of the coding region of the gene.

Technical advances have played an important role in the advance of genetic understanding. In 1970 American microbiologists Daniel Nathans and Hamilton Othanel Smith discovered a specialized class of enzymes (called restriction enzymes) that cut DNA at specific nucleotide target sequences. That discovery allowed American biochemist Paul Berg in 1972 to make the first artificial recombinant DNA molecule by isolating DNA molecules from different sources, cutting them, and joining them together in a test tube. These advances allowed individual genes to be cloned (amplified to a high copy number) by splicing them into self-replicating DNA molecules, such as plasmids (extragenomic circular DNA elements) or viruses, and inserting these into living bacterial cells. From these methodologies arose the field of recombinant DNA technology that presently dominates molecular genetics. In 1977 two different methods were invented for determining the nucleotide sequence of DNA: one by American molecular biologists Allan Maxam and Walter Gilbert and the other by English biochemist Fred Sanger. Such technologies made it possible to examine the structure of genes directly by nucleotide sequencing, resulting in the confirmation of many of the inferences about genes originally made indirectly.

In the 1970s Canadian biochemist Michael Smith revolutionized the art of redesigning genes by devising a method for inducing specifically tailored mutations at defined sites within a gene, creating a technique known as site-directed mutagenesis. In 1983 American biochemist Kary B. Mullis invented the polymerase chain reaction, a method for rapidly detecting and amplifying a specific DNA sequence without cloning it. In the last decade of the 20th century, progress in recombinant DNA technology and in the development of automated sequencing machines led to the elucidation of complete DNA sequences of several viruses, bacteria, plants, and animals. In 2001 the complete sequence of human DNA, approximately three billion nucleotide pairs, was made public.

A time line of important milestones in the history of genetics is provided in the table.

Classical genetics, which remains the foundation for all other areas in genetics, is concerned primarily with the method by which genetic traitsclassified as dominant (always expressed), recessive (subordinate to a dominant trait), intermediate (partially expressed), or polygenic (due to multiple genes)are transmitted in plants and animals. These traits may be sex-linked (resulting from the action of a gene on the sex, or X, chromosome) or autosomal (resulting from the action of a gene on a chromosome other than a sex chromosome). Classical genetics began with Mendels study of inheritance in garden peas and continues with studies of inheritance in many different plants and animals. Today a prime reason for performing classical genetics is for gene discoverythe finding and assembling of a set of genes that affects a biological property of interest.

Cytogenetics, the microscopic study of chromosomes, blends the skills of cytologists, who study the structure and activities of cells, with those of geneticists, who study genes. Cytologists discovered chromosomes and the way in which they duplicate and separate during cell division at about the same time that geneticists began to understand the behaviour of genes at the cellular level. The close correlation between the two disciplines led to their combination.

Plant cytogenetics early became an important subdivision of cytogenetics because, as a general rule, plant chromosomes are larger than those of animals. Animal cytogenetics became important after the development of the so-called squash technique, in which entire cells are pressed flat on a piece of glass and observed through a microscope; the human chromosomes were numbered using this technique.

Today there are multiple ways to attach molecular labels to specific genes and chromosomes, as well as to specific RNAs and proteins, that make these molecules easily discernible from other components of cells, thereby greatly facilitating cytogenetics research.

Microorganisms were generally ignored by the early geneticists because they are small in size and were thought to lack variable traits and the sexual reproduction necessary for a mixing of genes from different organisms. After it was discovered that microorganisms have many different physical and physiological characteristics that are amenable to study, they became objects of great interest to geneticists because of their small size and the fact that they reproduce much more rapidly than larger organisms. Bacteria became important model organisms in genetic analysis, and many discoveries of general interest in genetics arose from their study. Bacterial genetics is the centre of cloning technology.

Viral genetics is another key part of microbial genetics. The genetics of viruses that attack bacteria were the first to be elucidated. Since then, studies and findings of viral genetics have been applied to viruses pathogenic on plants and animals, including humans. Viruses are also used as vectors (agents that carry and introduce modified genetic material into an organism) in DNA technology.

Molecular genetics is the study of the molecular structure of DNA, its cellular activities (including its replication), and its influence in determining the overall makeup of an organism. Molecular genetics relies heavily on genetic engineering (recombinant DNA technology), which can be used to modify organisms by adding foreign DNA, thereby forming transgenic organisms. Since the early 1980s, these techniques have been used extensively in basic biological research and are also fundamental to the biotechnology industry, which is devoted to the manufacture of agricultural and medical products. Transgenesis forms the basis of gene therapy, the attempt to cure genetic disease by addition of normally functioning genes from exogenous sources.

The development of the technology to sequence the DNA of whole genomes on a routine basis has given rise to the discipline of genomics, which dominates genetics research today. Genomics is the study of the structure, function, and evolutionary comparison of whole genomes. Genomics has made it possible to study gene function at a broader level, revealing sets of genes that interact to impinge on some biological property of interest to the researcher. Bioinformatics is the computer-based discipline that deals with the analysis of such large sets of biological information, especially as it applies to genomic information.

The study of genes in populations of animals, plants, and microbes provides information on past migrations, evolutionary relationships and extents of mixing among different varieties and species, and methods of adaptation to the environment. Statistical methods are used to analyze gene distributions and chromosomal variations in populations.

Population genetics is based on the mathematics of the frequencies of alleles and of genetic types in populations. For example, the Hardy-Weinberg formula, p2 + 2pq + q2 = 1, predicts the frequency of individuals with the respective homozygous dominant (AA), heterozygous (Aa), and homozygous recessive (aa) genotypes in a randomly mating population. Selection, mutation, and random changes can be incorporated into such mathematical models to explain and predict the course of evolutionary change at the population level. These methods can be used on alleles of known phenotypic effect, such as the recessive allele for albinism, or on DNA segments of any type of known or unknown function.

Human population geneticists have traced the origins and migration and invasion routes of modern humans, Homo sapiens. DNA comparisons between the present peoples on the planet have pointed to an African origin of Homo sapiens. Tracing specific forms of genes has allowed geneticists to deduce probable migration routes out of Africa to the areas colonized today. Similar studies show to what degree present populations have been mixed by recent patterns of travel.

Another aspect of genetics is the study of the influence of heredity on behaviour. Many aspects of animal behaviour are genetically determined and can therefore be treated as similar to other biological properties. This is the subject material of behaviour genetics, whose goal is to determine which genes control various aspects of behaviour in animals. Human behaviour is difficult to analyze because of the powerful effects of environmental factors, such as culture. Few cases of genetic determination of complex human behaviour are known. Genomics studies provide a useful way to explore the genetic factors involved in complex human traits such as behaviour.

Some geneticists specialize in the hereditary processes of human genetics. Most of the emphasis is on understanding and treating genetic disease and genetically influenced ill health, areas collectively known as medical genetics. One broad area of activity is laboratory research dealing with the mechanisms of human gene function and malfunction and investigating pharmaceutical and other types of treatments. Since there is a high degree of evolutionary conservation between organisms, research on model organismssuch as bacteria, fungi, and fruit flies (Drosophila)which are easier to study, often provides important insights into human gene function.

Many single-gene diseases, caused by mutant alleles of a single gene, have been discovered. Two well-characterized single-gene diseases include phenylketonuria (PKU) and Tay-Sachs disease. Other diseases, such as heart disease, schizophrenia, and depression, are thought to have more complex heredity components that involve a number of different genes. These diseases are the focus of a great deal of research that is being carried out today.

Another broad area of activity is clinical genetics, which centres on advising parents of the likelihood of their children being affected by genetic disease caused by mutant genes and abnormal chromosome structure and number. Such genetic counseling is based on examining individual and family medical records and on diagnostic procedures that can detect unexpressed, abnormal forms of genes. Counseling is carried out by physicians with a particular interest in this area or by specially trained nonphysicians.

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genetics | History, Biology, Timeline, & Facts ...

Biology: Cell Structure – YouTube

This animation shows you the function of plant and animal cells for middle school and high school biology, including organelles like the nucleus, nucleolus, DNA (chromosomes), ribosomes, mitochondria, etc. Also included are ATP molecules, cytoskeleton, cytoplasm, microtubules, proteins, chloroplasts, chlorophyll, cell walls, cell membrane, cilia, flagellae, etc.

Watch another version of this video, narrated by a teacher, here: https://youtu.be/cbiyKH9uPUw

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anatomy | Definition, History, & Biology | Britannica.com

Anatomy, a field in the biological sciences concerned with the identification and description of the body structures of living things. Gross anatomy involves the study of major body structures by dissection and observation and in its narrowest sense is concerned only with the human body. Gross anatomy customarily refers to the study of those body structures large enough to be examined without the help of magnifying devices, while microscopic anatomy is concerned with the study of structural units small enough to be seen only with a light microscope. Dissection is basic to all anatomical research. The earliest record of its use was made by the Greeks, and Theophrastus called dissection anatomy, from ana temnein, meaning to cut up.

Comparative anatomy, the other major subdivision of the field, compares similar body structures in different species of animals in order to understand the adaptive changes they have undergone in the course of evolution.

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morphology: Anatomy

The best known aspect of morphology, usually called anatomy, is the study of gross structure, or form, of organs and organisms. It should not be inferred however, that even the human body, which has been extensively studied, has been so completely explored that nothing

This ancient discipline reached its culmination between 1500 and 1850, by which time its subject matter was firmly established. None of the worlds oldest civilizations dissected a human body, which most people regarded with superstitious awe and associated with the spirit of the departed soul. Beliefs in life after death and a disquieting uncertainty concerning the possibility of bodily resurrection further inhibited systematic study. Nevertheless, knowledge of the body was acquired by treating wounds, aiding in childbirth, and setting broken limbs. The field remained speculative rather than descriptive, though, until the achievements of the Alexandrian medical school and its foremost figure, Herophilus (flourished 300 bce), who dissected human cadavers and thus gave anatomy a considerable factual basis for the first time. Herophilus made many important discoveries and was followed by his younger contemporary Erasistratus, who is sometimes regarded as the founder of physiology. In the 2nd century ce, Greek physician Galen assembled and arranged all the discoveries of the Greek anatomists, including with them his own concepts of physiology and his discoveries in experimental medicine. The many books Galen wrote became the unquestioned authority for anatomy and medicine in Europe because they were the only ancient Greek anatomical texts that survived the Dark Ages in the form of Arabic (and then Latin) translations.

Owing to church prohibitions against dissection, European medicine in the Middle Ages relied upon Galens mixture of fact and fancy rather than on direct observation for its anatomical knowledge, though some dissections were authorized for teaching purposes. In the early 16th century, the artist Leonardo da Vinci undertook his own dissections, and his beautiful and accurate anatomical drawings cleared the way for Flemish physician Andreas Vesalius to restore the science of anatomy with his monumental De humani corporis fabrica libri septem (1543; The Seven Books on the Structure of the Human Body), which was the first comprehensive and illustrated textbook of anatomy. As a professor at the University of Padua, Vesalius encouraged younger scientists to accept traditional anatomy only after verifying it themselves, and this more critical and questioning attitude broke Galens authority and placed anatomy on a firm foundation of observed fact and demonstration.

From Vesaliuss exact descriptions of the skeleton, muscles, blood vessels, nervous system, and digestive tract, his successors in Padua progressed to studies of the digestive glands and the urinary and reproductive systems. Hieronymus Fabricius, Gabriello Fallopius, and Bartolomeo Eustachio were among the most important Italian anatomists, and their detailed studies led to fundamental progress in the related field of physiology. William Harveys discovery of the circulation of the blood, for instance, was based partly on Fabriciuss detailed descriptions of the venous valves.

The new application of magnifying glasses and compound microscopes to biological studies in the second half of the 17th century was the most important factor in the subsequent development of anatomical research. Primitive early microscopes enabled Marcello Malpighi to discover the system of tiny capillaries connecting the arterial and venous networks, Robert Hooke to first observe the small compartments in plants that he called cells, and Antonie van Leeuwenhoek to observe muscle fibres and spermatozoa. Thenceforth attention gradually shifted from the identification and understanding of bodily structures visible to the naked eye to those of microscopic size.

The use of the microscope in discovering minute, previously unknown features was pursued on a more systematic basis in the 18th century, but progress tended to be slow until technical improvements in the compound microscope itself, beginning in the 1830s with the gradual development of achromatic lenses, greatly increased that instruments resolving power. These technical advances enabled Matthias Jakob Schleiden and Theodor Schwann to recognize in 183839 that the cell is the fundamental unit of organization in all living things. The need for thinner, more transparent tissue specimens for study under the light microscope stimulated the development of improved methods of dissection, notably machines called microtomes that can slice specimens into extremely thin sections. In order to better distinguish the detail in these sections, synthetic dyes were used to stain tissues with different colours. Thin sections and staining had become standard tools for microscopic anatomists by the late 19th century. The field of cytology, which is the study of cells, and that of histology, which is the study of tissue organization from the cellular level up, both arose in the 19th century with the data and techniques of microscopic anatomy as their basis.

In the 20th century anatomists tended to scrutinize tinier and tinier units of structure as new technologies enabled them to discern details far beyond the limits of resolution of light microscopes. These advances were made possible by the electron microscope, which stimulated an enormous amount of research on subcellular structures beginning in the 1950s and became the prime tool of anatomical research. About the same time, the use of X-ray diffraction for studying the structures of many types of molecules present in living things gave rise to the new subspecialty of molecular anatomy.

Scientific names for the parts and structures of the human body are usually in Latin; for example, the name musculus biceps brachii denotes the biceps muscle of the upper arm. Some such names were bequeathed to Europe by ancient Greek and Roman writers, and many more were coined by European anatomists from the 16th century on. Expanding medical knowledge meant the discovery of many bodily structures and tissues, but there was no uniformity of nomenclature, and thousands of new names were added as medical writers followed their own fancies, usually expressing them in a Latin form.

By the end of the 19th century the confusion caused by the enormous number of names had become intolerable. Medical dictionaries sometimes listed as many as 20 synonyms for one name, and more than 50,000 names were in use throughout Europe. In 1887 the German Anatomical Society undertook the task of standardizing the nomenclature, and, with the help of other national anatomical societies, a complete list of anatomical terms and names was approved in 1895 that reduced the 50,000 names to 5,528. This list, the Basle Nomina Anatomica, had to be subsequently expanded, and in 1955 the Sixth International Anatomical Congress at Paris approved a major revision of it known as the Paris Nomina Anatomica (or simply Nomina Anatomica). In 1998 this work was supplanted by the Terminologia Anatomica, which recognizes about 7,500 terms describing macroscopic structures of human anatomy and is considered to be the international standard on human anatomical nomenclature. The Terminologia Anatomica, produced by the International Federation of Associations of Anatomists and the Federative Committee on Anatomical Terminology (later known as the Federative International Programme on Anatomical Terminologies), was made available online in 2011.

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