If one wanted to understand the role that genetics play in behavior, the best subset of the human population to study would be:
A) dizygotic twins
B) monozygotic twins
C) fraternal twins
D) non-twin siblings

Question

Quizplus · Accepted Answer

Monozygotic twins (identical twins) share 100% of their genetic material, while fraternal twins (dizygotic twins) share only 50% on average. Non-twin siblings share approximately 50% of their genetic material as well. Thus, studying monozygotic twins can help us understand the extent to which genetics contribute to behavior, as any differences between these twins must be due to non-genetic factors.

If One Wanted to Understand the Role That Genetics Play