genetic interaction (sensu unexpected) converging genetic interaction PSI-MI MI:0935 An effect in which two genetic perturbations, when combined, result in a phenotype that is less severe/penetrant than would be expected from the original phenotypes, in effect making the organism more "wild type" in character with regards to the phenotype in question. With respect to any single quantifiable phenotype, this may be expressed as an inequality as: E < ab <= wt OR wt <= ab < E where '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.