The Concordance Rate for Mood Disorders Has Been Found to Be

question 80

Multiple Choice

The concordance rate for mood disorders has been found to be about 67% among identical twins and 17% among fraternal twins. These data suggest that mood disorders ​

• A)are caused primarily by stress.
• B)have an onset at an early age.
• C)are due primarily to family environment.
• D)are caused in part by genetic factors.

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