Which of the following is true about the genetic factors of depression?

Question

Quizplus · Accepted Answer

Studies have found abnormalities on the serotonin transporter gene, specifically the 5-HTTLPR allele, to be associated with an increased risk for depression. This gene regulates the uptake of serotonin, a neurotransmitter involved in regulating mood, and abnormalities in this gene could affect the stability of individuals' moods.

Option A is incorrect because research has found that first-degree relatives of people with depression are about two to three times more likely to have depression themselves. Option B is incorrect because twin studies have actually found higher concordance rates for monozygotic twins (who share all their genes) than for dizygotic twins (who share only 50% of their genes). Option D is incorrect because research has found no significant differences in the heritability of depression between men and women.

Which of the Following Is True About the Genetic Factors