If the correlation for a trait is .75 for identical twins,.55 for siblings,.23 for cousins,and .11 for genetically unrelated adopted siblings,what could you conclude regarding the contribution of heredity and environment?
A) Heredity plays no role in the trait.
B) Environment plays no role in the trait.
C) Heredity is a prime contributor to the trait, but environment also plays a role.
D) Environment is the prime contributor to the trait, with heredity making only a minor contribution.
Correct Answer:
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