Question

In dogs, dark coat color is dominant over albino, and short hair is dominant over long hair. Assume that these effects are caused by two independently assorting genes. Seven crosses were done as shown below, in which D and A stand for the dark and albino phenotypes, respectively, and $\mathrm{S}$ and L stand for the short-hair and long-hair phenotypes. Write the genotypes of the parents in each cross. Use the symbols $C$ and $c$ for the dark and albino coat-color alleles and the symbols $H$ and $h$ for the short-hair and long-hair alleles, respectively. Assume parents are homozygous unless there is evidence otherwise.

          In dogs, dark coat color is dominant over albino, and short hair is dominant over long hair. Assume that these effects are caused by two independently assorting genes. Seven crosses were done as shown below, in which D and A stand for the dark and albino phenotypes, respectively, and $\mathrm{S}$ and
L stand for the short-hair and long-hair phenotypes. Write the genotypes of the parents in each cross. Use the symbols $C$ and $c$ for the dark and albino coat-color alleles and the symbols $H$ and $h$ for the short-hair and long-hair alleles, respectively. Assume parents are homozygous unless there is evidence otherwise.

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