In their research on the role of the serotonin transporter gene in depression,Caspi and his colleagues studied the effects of allele variations and environmental stressors on self-reports of depressive episodes.Which statement accurately summarizes their results?
A)People with two long alleles who experienced probable maltreatment earlier in life reported the most depressive episodes.
B)People with two short alleles who experienced probable maltreatment earlier in life reported the most depressive episodes.
C)People with one long and one short allele reported the most depressive episodes,regardless of maltreatment status.
D)People with two short alleles reported the most depressive episodes,regardless of maltreatment status.

Question

Quizplus · Accepted Answer

Caspi and his colleagues found that people with two short alleles of the serotonin transporter gene who experienced probable maltreatment earlier in life reported the most depressive episodes. The study did not find that people with two long alleles reported the most depressive episodes, so option A is incorrect. Option C is also incorrect because people with one long and one short allele did not report the most depressive episodes. Option D is also incorrect because it did not take into account the effects of maltreatment status.

In Their Research on the Role of the Serotonin Transporter