Twin studies have shown that if one identical twin has either major depression or bipolar disorder, the chances that the other twin will develop a mood disorder are about __________ percent.
A) 10-25
B) 25-50
C) 40-70
D) 90

Question

Quizplus · Accepted Answer

Twin studies have shown that if one identical twin has either major depression or bipolar disorder, the chances that the other twin will develop a mood disorder are about 40-70 percent. This suggests that genetic factors play a significant role in the development of these disorders.

Twin Studies Have Shown That If One Identical Twin Has