Three genes in fruit flies affect a particular trait, and one dominant allele of each gene is necessary to get a wild-type phenotype. a. what phenotypic ratios would you predict among the progeny if you crossed triply heterozygous flies? b. you cross a particular wild-type male in succession with three tester strains. in the cross with one tester strain (aa bb cc), only 1/4 of the progeny are wild type. in the crosses involving the other two tester strains (aa bb cc and aa bb co, half of the progeny are wild type. what is the genotype of the wild-type male?