Noun
(genetics) The influence of a single gene on multiple phenotypic traits; pleiotropism.
Antonym: polygeny
(pharmacology) The existence of drug effects other than the one for which the drug was designed; usually implies additional beneficial effects.
Source: en.wiktionary.orgBut as we know from our explanation of pleiotropy, changing one gene in a positive way could also have catastrophic unintended consequences. Source: Internet
The researchers also used sensitivity analyses to account for potential genetic pleiotropy included MR-Egger and weighted median MR. Source: Internet