What resemblance between twins occurs in their IQ scores?
A)Monozygotic twins and dizygotic twins resemble each other to an equal degree.
B)Monozygotic twins resemble each other more closely than dizygotic twins do.
C)Dizygotic twins resemble each other more closely than monozygotic twins do.
D)Monozygotic twins resemble each other more closely in childhood, but both types of twin resemble each other equally in adulthood.

Question

Quizplus · Accepted Answer

Monozygotic twins, who share 100% of their genes, have been found to have a significantly higher correlation in their IQ scores than dizygotic twins, who share 50% of their genes. This indicates a genetic influence on IQ scores, as opposed to simply shared environmental factors.

What Resemblance Between Twins Occurs in Their IQ Scores