In ursa gummi, the famed gummy bear soldiers, a quality that is sought is bravery (dominant phenotype). the recessive phenotype is timidity or conformity. the alleles and genotypes corresponding to these phenotypes at two loci are presented below. a_ codes for brave; aa codes for timid/conforming; b_ codes for brave; bb codes for timid/conforming. what is the phenotypic ratio of brave: timid offspring from a cross between two doubly heterozygous ursa gummi, if the mode of inheritance is duplicate recessive epistasis?