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pleiotropy

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WordReference Random House Unabridged Dictionary of American English © 2026

plei•ot•ro•py n. [Genetics.]

Geneticsthe phenomenon of one gene being responsible for or affecting more than one phenotypic characteristic.

1935–40; pleio- + -tropy

plei•o•trop•ic adj. plei′o•trop′i•cal•ly, adv.

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