In dogs, black coat color (B)is dominant over brown (b), and solid coat color (S)is dominant over white spotted coat (s).A cross between a black, solid female and a black, solid male produces puppies with only black, solid coats.This same female was then mated with a brown, spotted male.Half of the offspring from this cross were black and solid, and half of the offspring were black and spotted.Which of the following could be the genotype of the black, solid male?
A)BBSs
B)BBss
C)BbSS
D)BbSs
E)Bbss

Question

Quizplus · Accepted Answer

The black, solid male must have the genotype BbSS to produce only black, solid offspring with the black, solid female, indicating both are homozygous for the dominant solid trait (SS) and at least one is heterozygous for the black trait (Bb).

In Dogs, Black Coat Color (B)is Dominant Over Brown (B)