Twin and adoption studies have demonstrated that
A) there is no genetic component to temperament.
B) temperament is entirely due to genetic factors.
C) genes account for a small portion of variation in temperament.
D) genes account for a substantial portion of variation in some aspects of temperament.

Question

Quizplus · Accepted Answer

Twin and adoption studies have shown that genes account for a significant portion of variation in some aspects of temperament. This suggests that temperament is not entirely determined by genetics, but rather a complex interplay between nature and nurture.

Twin and Adoption Studies Have Demonstrated That