Hypostatic
A gene whose expression is masked by an epistatic gene. See hypostasis.
Related Terms:
Gene
The term coined by Johannsen (1909) for the fundamental physical and functional unit of heredity.
This may result in masking of one and in this case, the masked gene is said to be hypostatic. An epistatic-hypostatic relationship between two loci is similar to a dominant-recessive relationship between alleles at a particular locus.
Epistatic
A gene which suppresses the expression of another gene (= the hypostatic gene) when the two are not alternate alleles. See epistasis.
The gene whose phenotype is expressed is said to be epistatic, while the phenotype altered or suppressed is said to be hypostatic. Epistasis can be contrasted with dominance, which is an interaction between alleles at the same gene locus.
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.
 See also: Allele, Epistatic, Alleles, Locus, RNA
  
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