Question

a homozygous black - haired dog is mated with a homozygous white - haired dog.
if the alleles for hair color are codominant, which phenotype do you expect their puppies to have?
○ black hair
○ gray hair
○ either black or white hair
○ both black and white hair

Explanation:

Codominance means both alleles are expressed simultaneously. A homozygous black - haired dog (let's assume genotype \(BB\)) and a homozygous white - haired dog (genotype \(WW\)) will produce offspring with genotype \(BW\). In codominance, instead of blending (which would be incomplete dominance, giving gray hair if it were blending) or one allele masking the other (complete dominance), both alleles are expressed. So the puppies will show both black and white hair.

Answer:

both black and white hair