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

Question

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

Quizplus · Accepted Answer

The higher correlation of IQ scores between identical twins (who share 100% of their genes) compared to fraternal twins (who share about 50% of their genes) even when reared apart indicates a significant genetic component to intellectual development. This suggests that genetics plays a more substantial role than environmental factors in intellectual development.

The Fact That the Correlation in IQ Scores Between Identical