The results from studies that have compared correlations in intelligence between identical twins reared apart and fraternal twins reared together support the notion that:
A)intelligence is entirely determined by environmental factors
B)intelligence is inherited to a considerable degree
C)heredity does not contribute to similarities in intelligence scores
D)shared environment explains most of the similarity in family intelligence scores

Question

Quizplus · Accepted Answer

The results from studies that have compared correlations in intelligence between identical twins reared apart and fraternal twins reared together suggest that intelligence is inherited to a considerable degree. This is because identical twins share 100% of their genes as compared to fraternal twins who share only 50% of their genes, and yet identical twins who were reared apart showed greater similarities in intelligence scores as compared to fraternal twins who were reared together. This indicates that genetic factors play a significant role in determining intelligence.

The Results from Studies That Have Compared Correlations in Intelligence