If one member of a pair of identical twins is dependent on alcohol, which of the following describe what will occur for the other twin?
A) It is virtually certain that they too will be dependent on alcohol.
B) There have as high as a 50 percent chance of also being dependent on alcohol.
C) They have a 10 percent chance of also being dependent on alcohol.
D) There is no greater a risk for alcohol dependence than anyone else.

Question

Quizplus · Accepted Answer

Studies on twins have shown that genetics play a significant role in the risk of developing alcohol dependence. If one identical twin is dependent on alcohol, the other twin has a significantly increased risk, but it is not a certainty. The risk is estimated to be up to 50 percent, reflecting the influence of both genetic and environmental factors.

If One Member of a Pair of Identical Twins Is