If the correlation between the shyness of a sample of dizygotic twin pairs is .25 and the correlation between the shyness of a sample of monozygotic twin pairs is .50, then the heritability coefficient for shyness is
A) .125.
B) .250.
C) .500.
D) 2.00.

Question

Quizplus · Accepted Answer

The heritability coefficient is calculated as twice the difference between the monozygotic (MZ) and dizygotic (DZ) twin correlations. Here, it is 2 * (.50 - .25) = .50 or 50%.

If the Correlation Between the Shyness of a Sample of Dizygotic