If one member of a pair of identical twins is dependent on alcohol,the other twin
A)is virtually certain to also be dependent on alcohol.
B)has about a 50 percent chance of also being dependent on alcohol.
C)has about a 10 percent chance of also being dependent on alcohol.
D)is not at any greater risk for alcohol dependence than anyone else.

Question

Quizplus · Accepted Answer

While there is a genetic component to alcohol dependence, it is not 100% determinative, even in identical twins who share the same genetic makeup. Research has shown that if one twin is dependent on alcohol, the other twin has about a 50% chance of also being dependent on alcohol. This suggests that environmental factors and individual choices also play a role in the development of alcohol dependence.

If One Member of a Pair of Identical Twins Is