In two twin studies cited in your textbook,it was found that the percentage of monozygotic twins in which both twins are homosexual was 50 percent.Approximately the same,or a slightly lower,percentage of non-twin brothers or sisters was homosexual.What does this pattern of findings suggest?

Question

Quizplus · Accepted Answer

The findings suggest that while there is a genetic component to sexual orientation, as indicated by the 50% concordance rate in monozygotic twins, it is not solely determined by genetics since the rate is not 100%. This implies that other factors, such as environmental influences, also play a role.

In Two Twin Studies Cited in Your Textbook,it Was Found