Jamil and Qasim are identical twins, reared in different homes after their birth, due to the death of their parents. They are nineteen years of age and have personalities that differ sharply from each other. The reason of this difference in personality is most likely due to:
Correct answer: B. the environment
- A. the two having identical genotypes
- B. the environment
- C. heredity
- D. brain chemistry differences
Explanation
Because the twins share essentially the same genotype but were raised in different homes, environmental differences are the most direct explanation for their sharply different personalities. Heredity is held constant in this comparison.
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