Princess, a female dog with curly hair, was mated with Sir, a male dog with curly hair. All the puppies in the litter had curly hair. The following year, Princess was mated with George, an unrelated male with curly hair. All the puppies in this litter had smooth hair.
a. What are the genotypes of Princess, Sir, George, and both litters of puppies? Define your genetic nomenclature.
b. If the half-siblings of these two crosses interbreed, what are the expected phenotypic ratios in the progeny? Show your work.