Introduction to Behavioral and Molecular Genetics

9 important questions on Introduction to Behavioral and Molecular Genetics

What is the influence of the unique environment on a trait when the DZ correlation is .42 and the MZ correlation .72?


.28

What is a centromere?


the region of a chromosome where the chromatides attach

When a monozygotic twin brother or sister is diagnosed with Schizophrenia

It is likely that his/her MZ twin will also be diagnosed with Schizophrenia
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Klaas met his wife Willemijn at a support group for families with cystic fibrosis, a recessive genetic disorder. Willemijn and Klaas both have a sister who has been affected with CF and no other family history for this condition. They go to a clinical geneticist to find out what their risk is for a child with this condition.
What do you tell them?

They could both be heterozygous, so they could test whether they are carriers or not

When two traits have a phenotypic correlation of .20-.28 and a genotypic correlation of .39-.50, what does this mean?

The genes than influence trait one, also partly influence trait two

When you assess response time on a test to illustrate the link between a gene and IQ, you asses a ........?


Endophenotype

Cases of open adoptions give a less clear image of




Heritability and shared environment

The second law of Mendel implies?

That during gamete formation the segregation of each gene pair is independent of other pairs

For a certain trait, MZ and DZ correlations are similar, larger than 0 yet smaller than 1. This implies that individual differences in this trait are best explained by?


Shared and unique environmental factors

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