The fact that the correlation in weight between identical twins reared apart is higher than that between fraternal twins reared together suggests that weight is
A)influenced more by genetics than by environmental factors.
B)influenced more by environmental factors than by genetics.
C)affected equally by genetics and environmental factors.
D)not affected by either genetics or environmental factors.

Question

Quizplus · Accepted Answer

The higher correlation in weight among identical twins (who share 100% of their genes) compared to fraternal twins (who share, on average, 50% of their genes) even when reared apart indicates a stronger genetic influence on weight than environmental factors. Identical twins' weight similarity despite different environments underscores the role of genetics.

The Fact That the Correlation in Weight Between Identical Twins