Chapter 20, Problem 29P

A sample of $500$ field mice contains $225$ individuals that are ${\text{D}}_{\text{1}}{\text{D}}_{\text{1}}$, $175$ that are ${\text{D}}_{\text{1}}{\text{D}}_2$, and $100$ that are ${\text{D}}_2{\text{D}}_2$.

a. What are the frequencies of ${\text{D}}_{\text{1}}$ and ${\text{D}}_2$ in this sample?

b. Is this population in $\text{H-W}$ equilibrium? Use the chi $-$ square test to justify your answer.

c. Is inbreeding a possible genetic explanation for the observed distribution of genotypes? Why or why not?