In research looking at the biological causes of mood disorders, studies have shown that if one of a set of twins has a mood disorder, the probability that the other twin will have a mood disorder is .
A) 29%
B) 42%
C) 66%
D) 81%

Question

Quizplus · Accepted Answer

This is based on research into the heritability of mood disorders, particularly in twin studies. If one twin has a mood disorder, the likelihood that the other twin will also have a mood disorder is 66%. This suggests that genetics plays a significant role in the development of these conditions.

In Research Looking at the Biological Causes of Mood Disorders