Question

In mice, brown eyes (B) are dominant over blue (b). A homozygous brown-eyed males mouse mates with a blue-eyed female mouse and they have baby mice. What are the phenotypes and genotypes of their offspring? What are the genotypes of the parents?

Answer 1

Homozygous means same, so the male has the same genotype of BB, and because blue eyes are recessive, the female has to have bb. their offspring will have Bb as their genotype, and brown eyes as the pheno type.