epistasis
1:
Type of gene interaction in which a gene at one locus masks or suppresses the effects of a gene at a different locus.
© 2005 by W. H. Freeman and Company. All rights reserved. Pierce, B. Genetics: A conceptual approach. 2nd Edition.
2:
A form of gene action in which two or more loci interact nonadditively with each other to determine the phenotype; when epistasis is present, the phenotype associated with a particular genotype depends on which alleles are present at another locus.
© 2004 by Sinauer Associates, Inc. All rights reserved. Conner, J.K. and D.L. Hartl. A Primer of Ecological Genetics.
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