Family pedigree and twin studies have been used to look for a genetic predisposition for unipolar depression. These studies have found:
A) a lower rate of unipolar depression among children of parents with this disorder.
B) a higher than chance rate of depression among the families of depressed patients.
C) high rates of unipolar depression among dizygotic twins but not among monozygotic twins.
D) no compelling evidence for depression to be found in relatives of a depressed individual.

Question

Quizplus · Accepted Answer

Family pedigree and twin studies have found a higher than chance rate of depression among the families of depressed patients, suggesting a genetic predisposition for the disorder. This is consistent with the idea that depression has a heritable component.

Family Pedigree and Twin Studies Have Been Used to Look