Which of the following statements is supported by research on the role of genetic influences in unipolar disorder?
A) The more severe the depressive disorder, the greater the genetic contribution.
B) Twin studies do not consistently find evidence of an inherited susceptibility to depression.
C) Genes play a more significant causal role in bipolar disorders than they do in unipolar disorders.
D) Bipolar and unipolar disorders are equally heritable.

Question

Quizplus · Accepted Answer

Research has consistently found that there is a genetic contribution to unipolar depression, with the severity of the disorder being linked to a greater genetic component. Twin studies have consistently shown a higher rate of concordance in monozygotic twins compared to dizygotic twins, supporting a genetic influence. Bipolar and unipolar disorders have different heritabilities, with bipolar disorders having a stronger genetic component.

Which of the Following Statements Is Supported by Research on the Role