In terms of intelligence, identical twins reared together have very similar IQ scores, whereas fraternal twins reared together have scores that are less similar.

Question

Quizplus · Accepted Answer

This is a well-established finding in twin research. Identical twins share 100% of their genes, whereas fraternal twins share only about 50% of their genes on average. As such, identical twins have a higher genetic similarity than fraternal twins, which can explain why they tend to have more similar IQ scores when reared together.

In Terms of Intelligence, Identical Twins Reared Together Have Very