AP BIOLOGY

Detailed explanation-1: -Epistasis is a phenomenon in genetics in which the effect of a gene mutation is dependent on the presence or absence of mutations in one or more other genes, respectively termed modifier genes. In other words, the effect of the mutation is dependent on the genetic background in which it appears.

Detailed explanation-2: -Epistasis is a form on non-Mendelian inheritance in which one gene is capable of interfering with expression of another. This is often found associated with gene pathways where the expression of one gene is directly dependent on the presence or absence of another gene product within the pathway.

Detailed explanation-3: -The term epistasis describes a certain relationship between genes, where an allele of one gene (e.g., ‘spread’) hides or masks the visible output, or phenotype, of another gene (e.g., pattern).

Detailed explanation-4: -A gene is said to be epistatic when its presence suppresses the effect of a gene at another locus. Epistatic genes are sometimes called inhibiting genes because of their effect on other genes which are described as hypostatic.

Detailed explanation-5: -Epistasis refers to the behavioral effect of interaction among gene alleles at multiple locations. Epistasis is observable when phenotypic differences among individuals with the same genotype at one locus depend on their genotypes at another locus.