"Labrador retrievers come in three colors: black, brown, and yellow. Coat color among Labradors arises through the interaction between the alleles of two genes. One gene produces melanin. Allele B (black) is dominant to allele b (brown). Another gene, a regulatory gene, affects the deposition of pigment in individual hairs. Allele E promotes the deposition but in the recessive homozygote (ee) the gene blocks deposition and a yellow coat results. What are the phenotypic ratios of the F1 generation offspring of two dihybrids