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Twin studies allow the effects of environment ('nurture') and heredity ('nature') to be investigated in humans. In non-humans animals we can carry out controlled breeding experiments to investigate the effects of genes and environment on various traits. However this cannot be done with humans, for both ethical (it is wrong to produce children solely for the purposes of studying them) and practical reasons (it would take too long). Twin studies involve comparing identical and non-identical twins, or identical twins separated at birth. Identical twins have the same genes as each other, since they come from a single fertilized egg cell. Non-identical twins share only half of their genes with each other. All twins share (more or less) the same environment. So by examining how frequently certain traits occur in identical and non-identical twins we can estimate how much these traits are affected by genes. If identical twins are separated at birth (eg for adoption) then they will have the same genes but different environments. This also allows the effects of genes to be estimated. However, such twins will have shared the same uterus and so will have been subkect to similar, though not identical, pre-birth environments. These kinds of studies allow the influence of genes on many medical conditions to be studied. See: http://genome.wellcome.ac.uk/doc_WTD020902.html http://www.sciencemuseum.org.uk/on-line/genes/118.asp http://www.apa.org/monitor/apr04/second.html http://news.bbc.co.uk/1/hi/health/7230065.stm
Wiki User
∙ 16y ago
Wiki User
∙ 12y agohard to be together because one gose some where and the other 1 stay there wait for it example:carlos goes to the restroom and chris stay in the chair wait for his turn
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Why do scientists use studies of twins to learn about human characteristics?
Because I like men
How can the human race benefit from cloning?
Probably not at all (after all, twins are clones), except for studies of heredity.
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son of a balloon
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Advantages if you finish your studies?
the advantages if i finish my studies is to learn ,
What are the disadvantages of using twins studies?
Some disadvantages of using twin studies include potential difficulty in determining the unique contributions of genetics and environment, limited generalizability to the broader population, and ethical concerns related to the use of human subjects, especially in cases of separation of twins.
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they give better understanding to the students
Are studies in twins more important in understanding single gene traits or quantitative traits?
Studies in twins more important in understanding quantitative traits.
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inbreeding has resulted in these rats being "twins" of all the others.
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Operational definition of similarities in twin studies?
Similarities in twin studies typically refer to the extent to which identical twins (who share 100% of their genes) are more similar to each other in terms of a particular trait or characteristic than fraternal twins (who share, on average, 50% of their genes). This difference in similarity between types of twins allows researchers to estimate the heritability of that trait.
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Case studies are educational and informative. Many intellectuals read case studies to get insight about studies conducted around the world.
Why do scientists use studies of twins to learn about human characteristics?
Because I like men
