Chapter 14, Problem 9TYK

In guinea pigs, the brown coat color allele (B) is dominant over red (b), and the solid color allele (S) is dominant over spotted (s). The F₁ offspring of a cross between true-breeding brown, solid-colored guinea pigs and red, spotted pigs are crossed. What proportion of their offspring (F₂) would be expected to be red and solid colored?

1. a. $\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$9$}\right.$
2. b. $\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$16$}\right.$
3. c. $\raisebox{1ex}{$3$}\!\left/ \!\raisebox{-1ex}{$16$}\right.$
4. d. $\raisebox{1ex}{$9$}\!\left/ \!\raisebox{-1ex}{$16$}\right.$