genetic suppression (complete) orchard 2013-06-05T21:34:57Z MI:1290 PSI-MI all-suppressing genetic interaction An effect in which the perturbation of one gene results in complete suppression (to wild type) of the mutant phenotype caused by perturbation of another gene. The phenotype of the suppressing perturbation may or may not be known. With respect to any single quantifiable phenotype, this may be expressed as an inequality as: wt = ab != a = E where 'a' is the observed phenotype values of an individual perturbation, 'ab' is the observed phenotype value of the double perturbation, 'E' is the expected phenotype value of the double perturbation, and 'wt' is the wild type phenotype value. genetic suppression