Suppose That a Researcher Measures a Trait in Many Pairs

Multiple Choice

Suppose that a researcher measures a trait in many pairs of identical twins and many pairs of fraternal twins.If the researcher finds that the correlation for identical twins on this trait was .60 and that the correlation for fraternal twins was .30,what would this tell us about the heritability of the trait? (Assume that all twins of the same pair were raised together.For the purpose of this question,accept all assumptions about the use of this twin design. )

A) The heritability was .30,and all of it is due to additive genetic influences.
B) The heritability was .30,and all of it is due to non-additive genetic influences.
C) The heritability was .60,and all of it is due to additive genetic influences.
D) The heritability was .60,and all of it is due to non-additive genetic influences.
E) The heritability was .60,and it is equally divided between additive and non-additive genetic influences.