When examining the data on sexual orientation of twins and other siblings, what seems to be the most reasonable conclusion?
A) Genetic factors completely determine sexual orientation.
B) Genetic factors play no role in sexual orientation.
C) Sexual orientation is determined by genetics as well as other factors.
D) Genetic factors determine sexual orientation in men, but do not seem to play a role for women.

Question

Quizplus · Accepted Answer

The most reasonable conclusion is that sexual orientation is determined by a combination of genetic factors and other environmental factors. Studies on twins and other siblings have shown that there is a higher likelihood of a gay or lesbian individual having a sibling who is also gay or lesbian, indicating a genetic component. However, there are also many individuals who have identical genetic makeup but have different sexual orientations, suggesting the influence of environmental and social factors. Therefore, it is likely that sexual orientation is a complex and multifactorial trait.

When Examining the Data on Sexual Orientation of Twins and Other