In comparison of identical twins reared together and identical twins reared apart, it was found that
A) those reared together always have more similar personality traits than those reared apart.
B) those reared apart tend to be completely different from each other in personality traits because they experienced different environments.
C) if one identical twin had a mental illness, the other twin will have the same mental illness, whether reared together or apart.
D) some twins reared apart appeared very similar, while some reared together appeared rather different.

Question

Quizplus · Accepted Answer

Studies have shown that while identical twins reared together tend to have more similar personality traits than those reared apart, there are still cases where twins reared together appear rather different and vice versa. This suggests that while genetics play a role in personality, the environment also has an impact. It is also important to note that while the likelihood of both twins having the same mental illness is higher in identical twins, it is not always the case.

In Comparison of Identical Twins Reared Together and Identical Twins