If you were to administer a Big Five test in a behaviour genetics study of personality,which pair of individuals would you expect to have the most similar scores

Question

Quizplus · Accepted Answer

Identical twins share 100% of their genes and therefore have the highest genetic similarity. They also share similar environmental influences as they are often raised in the same household. As the Big Five traits are partially determined by genetics, identical twins would likely have the most similar scores on these traits.

If You Were to Administer a Big Five Test in a Behaviour