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epistasis
e·pis·ta·sis E0182500 (ĭ-pĭs′tə-sĭs)n. pl. e·pis·ta·ses (-sēz′) 1. An interaction between nonallelic genes in which the genotype at one locus affects the expression of alleles at another locus.2. A film that forms over the surface of a urine specimen.3. The suppression of a bodily discharge or secretion.
[Greek, stoppage, from epistanai, to stop, check : ep-, epi-, epi- + histanai, to place; see stā- in Indo-European roots.]
ep′i·stat′ic (ĕp′ĭ-stăt′ĭk) adj.epistasis (ɪˈpɪstəsɪs) n1. (Medicine) obsolete scum on the surface of a liquid, esp on an old specimen of urine2. (Medicine) med the arrest or checking of a bodily discharge, esp bleeding3. (Genetics) genetics Also called: hypostasis the suppression by a gene of the effect of another gene that is not its allele[C19: from Greek: a stopping, from ephistanai to stop, from epi- + histanai to put] epistatic adje•pis•ta•sis (ɪˈpɪs tə sɪs)
n., pl. -ses (-ˌsiz) a form of interaction between nonallelic genes in which one combination of such genes has a dominant effect over other combinations. [1915–20; probably after epistatic (1907) (probably epi- + static, taken as meaning “standing above”)] ep•i•stat•ic (ˌɛp əˈstæt ɪk) adj. Thesaurus| Noun | 1. | epistasis - the suppression of a gene by the effect of an unrelated genehypostasisbiological process, organic process - a process occurring in living organisms |
Epistasis
epistasis[ə′pis·tə·səs] (genetics) The suppression of the effect of one gene by another. (medicine) A checking or stoppage of a hemorrhage or other discharge. (pathology) A scum or film of substance floating on the surface of urine. Epistasis the interaction of two nonallelic genes (that is, genes that are at different loci) whereby one of them, called the epistatic gene, suppresses the effect of the other one, called the hypostatic gene. Phenotypically, epistasis is manifested as a deviation from the segregation that would be expected in digenetic inheritance; in this case, however, there is no violation of Mendel’s laws, inasmuch as the alleles of the interacting genes are distributed in complete conformity to the law of independent assortment, or combination. epistasis
epistasis [ĕ-pis´tah-sis] 1. suppression of a secretion or excretion, as of blood, menses, or lochia.2. the interaction between genes at different loci, as a result of which one hereditary character is unexpressed, or is masked by the superimposition of another upon it. See also dominance. adj., adj epistat´ic.e·pis·ta·sis (e-pis'tă-sis), 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." Synonym(s): epistasy [G. scum; epi- + G. stasis, a standing] epistasis (ĭ-pĭs′tə-sĭs)n. pl. epista·ses (-sēz′) 1. An interaction between nonallelic genes in which the genotype at one locus affects the expression of alleles at another locus.2. A film that forms over the surface of a urine specimen.3. The suppression of a bodily discharge or secretion.
ep′i·stat′ic (ĕp′ĭ-stăt′ĭk) adj.e·pis·ta·sis (e-pis'tă-sis) 1. The formation of a pellicle or scum on the surface of a liquid, especially 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 with the expressed phenotype is said to be epistatic, the phenotype altered or suppressed is then said to be hypostatic. [G. scum; epi- + G. stasis, a standing] Fig. 152 Epistasis . The interaction of genes A and B. epistasis a form of genetic interaction in which one gene interferes with the expression of another gene, as when, for example, genes A and B code for enzymes active in the same PATHWAY. See Fig. 152 . If both ALLELES of gene A code for a nonfunctional version of enzyme A, then the pathway will shut down, irrespective of which B alleles are present, i.e. gene A is epistatic to gene B. Compare DOMINANT EPISTASIS, RECESSIVE EPISTASIS.e·pis·ta·sis (e-pis'tă-sis) Formation of a pellicle or scum on the surface of a liquid, especially as on standing urine. [G. scum; epi- + G. stasis, a standing]epistasis
Synonyms for epistasisnoun the suppression of a gene by the effect of an unrelated geneSynonymsRelated Words- biological process
- organic process
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