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) 40 to 70
B) 10 to 25
C) 25 to 50
D) 90

Question

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) 40 to 70 
B) 10 to 25
C) 25 to 50 
D) 90

Quizplus · Accepted Answer

Twin studies indicate a high concordance rate for mood disorders among identical twins, suggesting a genetic component, with rates typically ranging from 40 to 70 percent.

Twin Studies Have Shown That If One Identical Twin Has