Twin studies of intelligence have found that the IQ scores of:
A) monozygotic and dyzogotic twins are similar.
B) monozygotic twins are more similar than the IQ scores of dyzogotic twins.
C) dyzogotic twins are more similar than the IQ scores of monozygotic twins.
D) monozygotic and dyzogotic twins are largely unrelated.

Question

Quizplus · Accepted Answer

Twin studies of intelligence have consistently found that monozygotic twins (who share 100% of their genes) have more similar IQ scores than dizygotic twins (who share about 50% of their genes). This suggests that genetic factors play a significant role in determining intelligence.

Twin Studies of Intelligence Have Found That the IQ Scores