epistasis


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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]
Epistasisclick for a larger image
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]
References in periodicals archive ?
By comparing Tables 1 and 3, we can see that the consideration of epistasis allows us to construct a more accurate model.
Experimental results show that our method has better performance in GWAS datasets containing epistasis effect among SNPs.
Xing, "Dominance and epistasis are the main contributors to heterosis for plant height in rice," Plant Science, vol.
En esta variable se presenta un tipo de interaccion de epistasis recesiva o doble recesiva, ya que segun Mather y Jinks (1971) cuando los efectos [h], [i] y [l] tienen los mismos signos, existe este tipo de interaccion epistatica.
Epistasis that has been ignored in most genetic association studies might explain a large portion of genetic variation for complex traits.
Epistasis: The interaction of genes; the effect of one gene is modified by the allele that exists at a different site in the genome.
These genes can be linked; genes can also interact via epistasis or complementation.
The influence such combinations have on an organization's adaptive fitness is known as epistasis.
It is worth noting that this is not a case of dominance because epistasis genes influence nonallelic genes.
Epistasis, one of the genetic phenomena likely involved in the pathogenesis of systemic lupus erythematosus, is best defined as: