Studies on identical twins have found that differences in genes explain ________ of the variability in personality traits.
A) almost none
B) almost all
C) about half
D) an unknown amount

Question

Quizplus · Accepted Answer

Studies on identical twins have shown that differences in genes explain about half of the variability in personality traits, with the rest being influenced by environmental factors.

Studies on Identical Twins Have Found That Differences in Genes