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Table of Contents > Health Dictionary > Epistasis

Epistasis

1. The formation of a pellicle or scum on the surface of a liquid, especially as on standing urine. 2. Phenotypic interaction of nonallelic genes. 3. A form of gene interaction whereby one gene masks or interferes with the phenotypic expression of one or more genes at other loci; the gene the express phenotype of which is said to be “epistatic,” whereas the phenotype altered or suppressed is then said to be “hypostatic.”
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