Chapter 6, Problem 11CONQ

When true-breeding mice with brown fur and short tails $\left(BBtt\right)$ were crossed to true-breeding mice with white fur and long tails $\left(bbTT\right),$ all of the ${\text{F}}_{\text{1}}$ offspring had brown fur and long tails. The ${\text{F}}_{\text{1}}$ offspring were crossed to mice with white fur and short tails. What are the possible phenotypes of the ${\text{F}}_{\text{2}}$ offspring? Which ${\text{F}}_{\text{2}}$ offspring are recombinant, and which are nonrecombinant? What are the ratios of phenotypes of the ${\text{F}}_{\text{2}}$ offspring if independent assortment is taking place? How are the ratios affected by linkage?