Identical twins are somewhat than fraternal twins to share a homosexual orientation; however, question 10 options:
a. more likely; because sexual orientation differs in many twin pairs, other factors are also at work
b. less likely; because sexual orientation differs in many twin pairs, other factors are also at work
c. less likely; sexual orientation is influenced less by heredity than by environment
d. more likely; sexual orientation is influenced less by heredity than by environment