Behavioral Genetics Study of the influence of genetic factors on behavioral traits.

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Presentation transcript:

Behavioral Genetics Study of the influence of genetic factors on behavioral traits

What is heritability? https://www.youtube.com/watch?v=m0T2miip8jo

Heritability the extent to which genetic individual differences contribute to individual differences in observed behavior

Heritability Ranges from 0 to 1! What does the range mean?... “A heritability close to zero indicates that almost all of the variability in a trait among people is due to environmental factors, with very little influence from genetic differences. Characteristics such as religion, language spoken, and political preference have a heritability of zero because they are not under genetic control. A heritability close to one indicates that almost all of the variability in a trait comes from genetic differences, with very little contribution from environmental factors. Many disorders that are caused by mutations in single genes, such as phenylketonuria (PKU), have high heritability. Most complex traits in people, such as intelligence and multifactorial diseases, have a heritability somewhere in the middle, suggesting that their variability is due to a combination of genetic and environmental factors.” US National Library of Science

NATURE V. NURTURE DEBATE! 1

Twin Studies Monozygotic = Identical Dizygotic = Fraternal Share all of their genes Dizygotic = Fraternal Share ½ of their genes

Genetics! Twin Studies https://www.cbsnews.com/news/just-alike-twins-separated-at- birth/?ftag=CNM-00-10aab6i&linkId=34143967 What did they find with studying separated twins?

Genetics “Quest of the Web!” – Colin A