In male identical twins, if one of the twins is gay, the other has about a ________% chance of also being gay.

A) 50
B) 25
C) 75
D) 100

Research indicates that if one male identical twin is gay, the likelihood of the other being gay is approximately 50%. This suggests a significant genetic or biological component to sexual orientation, though it also indicates that other factors, such as environment, play a role.