Sunlight exposure has a stronger effect on skin cancer risk in fair-skinned humans than in individuals with darker skin. This is an example of A) pleiotropy B) epistasis. C) genotype-by-environment interaction. D) differences in the norm of reaction. E) All of these choices are correct.
Added by Emilia K.
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This suggests that there is an interaction between the individual's genotype (skin color) and the environment (sunlight exposure). Pleiotropy refers to a single gene affecting multiple traits, which is not the case here. Epistasis refers to the interaction Show more…
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