Research concerned with sexual orientation has demonstrated which of the following?
A) Genetic influences on sexual orientation are complex and involve the interaction of multiple genes, and not just a single "gay" gene.
B) The more biologically related older brothers a man has, the more likely he is to be homosexual.
C) Both genetic and environmental factors are involved in sexual orientation.
D) All of these have been demonstrated in research on sexual orientation.

Question

Quizplus · Accepted Answer

All of these have been demonstrated in research on sexual orientation. Research has shown that genetic influences on sexual orientation are complex and involve the interaction of multiple genes, not just a single "gay" gene. The more biologically related older brothers a man has, the more likely he is to be homosexual, suggesting that there may be a biological component to sexual orientation. However, environmental factors, such as upbringing and social influences, also play a role in sexual orientation.

Research Concerned with Sexual Orientation Has Demonstrated Which of the Following