What have twin studies told us about sexual orientation?
A)They are clear in supporting that sexual orientation is influenced only by genetic factors.
B)They clearly do not support the idea that sexual orientation is influenced by genetics.
C)Although supporting a genetic influence on sexual orientation,they do not rule out environmental influences as a contributor.
D)They have not been done in the matter of sexual orientation.

Question

Quizplus · Accepted Answer

Twin studies have shown that there is a genetic influence on sexual orientation, but they also suggest that environmental factors may play a role as well. While there is no single "gay gene," studies have found that identical twins - who share all of their genes - are more likely to share a sexual orientation than fraternal twins, who only share about half of their genes. However, the fact that not all identical twins share a sexual orientation indicates that there are other factors, beyond genetics, involved in determining sexual orientation.

What Have Twin Studies Told Us About Sexual Orientation