[Gk. a stopping] A phenomenon in which one gene alters the expression of another gene that is independently inherited.

"the checking of a discharge," medical Latin, from Greek epistasis "a stopping, stoppage, a halting," from epi "upon" (see epi-) + stasis "a stopping or standing&quo [..]

Epistasis is a circumstance where the expression of one gene is affected by the expression of one or more independently inherited genes. For example, if the expression of gene #2 depends on the expression of gene #1, but gene #1 becomes inactive, then the expression of gene #2 will not occur. In this example, gene #1 is said to be epistatic to gene [..]

A type of genetic interaction: the nonreciprocal interaction of nonallelic genes in which the expression of one gene masks the expression of another. For example, if the expression of Gene A masks that of Gene B, Gene A is said to be epistatic to Gene B, whereas Gene B is hypostatic to Gene A.

The interaction of nonallelic genes to control a phenotype in a different gene; contrast to same-gene allelic interactions to control a single-gene phenotype. © Nature Education

A genetic interaction where one or more genes can modify the expression of another gene and therefore its phenotype, when the two genes are not alternate alleles of the same phenotype. The gene which [..]

Interaction between alleles

Very generally: interaction between different genes

  Interactions between non-allelic genes in their effects on a trait. Any type of interaction in which the genotype at one locus affects the phenotypic expression of a genotype at another locus.

A general term for any interaction between genes at different loci, includes collaborative genes, complementary genes, and supplementary genes (these may all be referred to as epistasis).

(n) the suppression of a gene by the effect of an unrelated gene

A form of Gene interaction whereby the expression of one Gene interferes with or Masks the expression of a different Gene or Genes. Genes whose expression interferes with or Masks the effects of other [..]

Epistasis is the interaction between the genes at two or more loci, so that the phenotype differs from what would be expected if the loci were expressed independently. It is important in population ge [..]

A gene interaction whereby the expression of one gene interfers with or masks the expression of a different gene or genes. Genes whose expression interfers with or masks the effects of other genes are [..]

A form of gene interaction in which one gene interferes with the phenotypic expression of another nonallelic gene so that the phenotype is governed by the former gene and not by the latter gene when b [..]

The blocking of the effects of one gene by the expression of another, non-allelic gene.

A term from biology used to denote that the fitness

The masking of the phenotypic effect of alleles at one gene by alleles of another gene. A gene is said to be epistatic when its presence suppresses the effect of a gene at another locus. Epistatic gen [..]

An effect of the interaction between two or more gene loci on the phenotype or fitness whereby their joint effect differs from the sum of the loci taken separately.

Masking of a phenotypic trait through the action of a mutant allele. For example, albinism (absence of pigment) is epistatic to coat color genes that determine black vs. brown fur.

Interaction between genes.