Chapter 4, Problem 12P

Using the information provided in Problems $\text{10}$ and $\text{11}$, determine the genotype and phenotype of parents that produce the following progeny:

a. $\frac{\text{9}}{\text{16}}$ brown: $\frac{3}{16}$ black: $\frac{\text{4}}{\text{16}}$ albino

b. $\frac{\text{3}}{\text{8}}$ black: $\frac{\text{3}}{\text{8}}$ cream: $\frac{\text{2}}{\text{8}}$ albino

c. $\frac{\text{27}}{\text{64}}$ brown: $\frac{\text{16}}{\text{64}}$ albino: $\frac{\text{9}}{\text{64}}$ yellow: $\frac{\text{9}}{\text{64}}$ black: $\frac{\text{3}}{\text{64}}$ cream

d. $\frac{\text{3}}{\text{4}}$ brown: $\frac{\text{1}}{\text{4}}$ yellow