Biology / Bio 1749 · Atom · ~20 seconds
Polymorphism
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A polymorphic population displays two or more distinct phenotypic variants of a characteristic among its individuals, reflecting genetic variation at that locus.
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A litter of kittens showing several distinct coat-color patterns illustrates variation at a polymorphic locus within one litter.
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A trait is polymorphic only where variation has a genetic basis — diet or environment alone does not make a population polymorphic.