Identical twins are somewhat ________ than fraternal twins to share a homosexual orientation;however,________.
A) more likely;sexual orientation is influenced less by heredity than by environment
B) less likely;sexual orientation is influenced less by heredity than by environment
C) more likely;because sexual orientation differs in many twin pairs,other factors are also at work
D) less likely;because sexual orientation differs in many twin pairs,other factors are also at work

Question

Quizplus · Accepted Answer

Although identical twins are more likely than fraternal twins to share a homosexual orientation, sexual orientation differs in many twin pairs, suggesting that other factors beyond genetics are also influential. This indicates that genetics are not the sole determinant of sexual orientation, and that environmental factors, such as upbringing and social context, may also play a role.

Identical Twins Are Somewhat ________ Than Fraternal Twins to Share