In twin studies it was found that if one member of a pair of identical twins abused alcohol, the other abused it in _____ percent of cases. In a similar study of fraternal twins, if one twin abused alcohol, the other abused it in ____ percent of cases.
A) 54; 28
B) 27: 9
C) 95: 65
D) 70: 16

Question

Quizplus · Accepted Answer

Twin studies show that identical twins have a higher concordance rate for alcohol abuse compared to fraternal twins, indicating a genetic component. The correct percentages are 54% for identical twins and 28% for fraternal twins.

In Twin Studies It Was Found That If One Member