epistasis

e·pis·ta·sis (-pst-ss)

n. pl. e·pis·ta·ses (-sz)

1. A film that forms over the surface of a urine specimen.

2. An interaction between nonallelic genes, especially an interaction in which one gene suppresses the expression of another.

3. The suppression of a bodily discharge or secretion.

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epi·static (p-sttk) adj.

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epistasis,

n gene interaction where a gene at a particular locus supercedes or obscures the expression of another gene at a different locus.

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epistasis

non-allelic masking of one gene by another, e.g. the masking of the black gene by the orange gene in tortoiseshell cats.