Which of the following is the strongest evidence that personality has a genetic component?
A) Adopted children in the same family are similar in personality.
B) Identical twins are more similar in personality than nonidentical twins.
C) People in the same culture are similar in personality.
D) Both biological and nonbiological siblings show similar personalities.

Question

Quizplus · Accepted Answer

Identical twins share 100% of their genes, and studies have shown that they are more similar in personality than fraternal (nonidentical) twins, who share only about 50% of their genes. This suggests that genetics plays a significant role in determining personality.

Which of the Following Is the Strongest Evidence That Personality