A major question address by comparing monozygotic and dizygotic twins, or comparing adopted children with their adoptive and biological parents, is:
A) To what degree has natural selection influenced human evolution?
B) Does a single gene or do multiple genes influence complex behavior?
C) Are psychological disorders homozygous or heterozygous conditions?
D) To what extent do genes, the environment, and their interaction influence behavior?

Question

Quizplus · Accepted Answer

Comparing monozygotic and dizygotic twins or adopted children with their adoptive and biological parents allows researchers to explore the extent to which genes, the environment, and their interaction influence behavior. This helps to clarify the role of genetic and environmental factors in behavioral and psychological traits.

A Major Question Address by Comparing Monozygotic and Dizygotic Twins