Dr.Kurz is studying twins where at least one twin suffers from depression.She finds that both twins are much more likely to share the disorder if they are monozygotic rather than dizygotic twins.What should Dr.Kurz conclude based on her findings?
A)Depression is entirely genetic.
B)The heritability of depression is high.
C)The heritability of depression is low.
D)Monozygotic twins are at a higher risk for depression than non-twins.

Question

Quizplus · Accepted Answer

The fact that monozygotic twins (who share 100% of their genes) are more likely to both have depression than dizygotic twins (who share only 50% of their genes on average) suggests that depression has a strong genetic component. This implies that the heritability of depression is high. However, it does not necessarily mean that depression is entirely genetic or that monozygotic twins are at a higher risk for depression than non-twins.

DrKurz Is Studying Twins Where at Least One Twin Suffers