What is the definition of epistasis?

when the allele of one gene interferes with the expression of another gene

when a dominat allele for a specific trait is not completely expressed over the recessive allele

when one trait is determined by multiple genes

when one gene affects multiple phenotypes

1 answer

The definition of epistasis is when the allele of one gene interferes with or modifies the expression of another gene. This interference can result in the masking or altering of phenotypic traits. Epistasis can occur in various forms, such as dominant epistasis, recessive epistasis, duplicate recessive epistasis, and duplicate dominant epistasis.