If a scientist is studying the heritability of IQ, which people would show the highest correlation between their IQ scores?
A) two unrelated children
B) a child and his mother
C) monozygotic twins
D) dizygotic twins

Question

Quizplus · Accepted Answer

Monozygotic twins have the highest genetic similarity, as they come from a single fertilized egg that splits into two embryos. They share almost all of their genetic material, making them an ideal group to study the heritability of IQ. The correlation between their IQ scores is expected to be higher than any other group mentioned.

If a Scientist Is Studying the Heritability of IQ, Which