noun🔗ShareThe modification of the expression of a gene by another unrelated one."In Labrador Retrievers, coat color determination is an example of epistasis, where one gene (E/e) determines if pigment is deposited at all, overriding the effect of the gene (B/b) that determines the color of the pigment itself (black or brown). "biologybiochemistryorganismChat with AIVocabulary GamePractice Reading