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Identical twins are a useful tool in study of effet of genes and environment on genetic traits including human behaviors.This study is done by keeping identical twins in same environment and in different environments. Experiment performed by this technique indicate that genes have 66% effect on behaviors etc. while environment have 33% effect.This is called concordance.Identical twins show similar behavior (66%) even if reared apart in different environments which is due to same genes.
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Trait which is controlled by a combination of genes plus environmental influences?
These could be polygenic genes. They can be influenced by a variety of factors in the persons life so it is difficult to know how it will turn out.
What is A situation in which genes are attached to an organisms sex chromosomes the sex of an organism influences the expression of a gene?
s.e.x linked
Do every action in your body depend on genes?
No. Some of your actions will depend on the genes you have inherited. However others will depend on environmental influences. For example, two twins are separated at birth. They both have the same genes. They both have an inherited ability to sing. However, one grows up sounded by bugs, and the other lives in a city. The former will therefore not run away when presented with a spider; the latter will. If you mean action as in your heart beat e.t.c., that is not your genes. Your genes define things like your hair colour, and your eye colour. The processes of your body develop naturally, unless, of course, you have inherited a genetic disease. That is the only instance in which genes will effect the action of these bodily processes.
What do identical twins have the same sat of?
They have the same set of chromosomes, which can be also stated as having the same set of genes.
Why are the identical twins different?
Because genes do not account for every trait or characteristic. Some characteristics are influenced by environment.
Who are the only people with the exact same genes?
only twins have the same genes (all twins)
What is the study by which researches look at how much of human behavior is determined by genes and how much by environment?
Twin studies are often used to investigate the contributions of genetics and environmental factors to human behavior. By comparing the similarities between identical twins (who share 100% of their genes) and fraternal twins (who share around 50% of their genes), researchers can estimate the relative influences of nature (genetics) and nurture (environment) on certain traits or behaviors.
How can you tell twins apart?
Birthmarks, hairstyles, personalities, etc.
If My boyfriend is a twin will you have twins?
twins are passed down through the mother's genes.
Identical twins have the same set of?
genes
Why do scientist study twins separated at birth?
Twins separated at birth provide a unique opportunity for control in personality experiments. Identical twins have exactly the same DNA so any variation in their personalities has to be a consequence of experience alone, not inheritance. Twins separated at birth have the 'purest' conditions to test such hypothesis on. It is an opportunity to investigate the old 'nature versus nurture' controversies. Are we who we are because of how we were raised or because of our genes.
The two main influences that makes personalities complex and unique are?
heredity and enviroment.
What are two horses with identical genes called?
Identical twins. Although horses sometimes have twins I'm not sure if they have identical twins.
Are some people born with strict personalities?
Absolutely! I call them "strict genes".
What percent of genes do fraternal twins share?
50%
What attempts to tease apart the relative contributions of heredity and environment?
Twin and adoption studies are commonly used to tease apart the relative contributions of heredity and environment in various traits and behaviors. By comparing the similarities between identical twins (who share 100% of their genes) and fraternal twins (who share 50% of their genes on average), researchers can estimate the genetic and environmental influences on a particular trait.
A psychologist is interested in finding out why identical twins have different personalities?
they may be twins but their minds wont be the same. No Human mind is the same.
