Black fur in mice (B)is dominant to brown fur (b). Short tails (T)are dominant to long tails (t). What fraction of the progeny of the cross BbTt × BBtt will have black fur and long tails?

Question

Quizplus · Accepted Answer

The cross BbTt × BBtt results in offspring with genotypes: BBTt, BBtt, BbTt, and Bbtt. All offspring will have black fur (BB or Bb), and half will have long tails (Tt). Therefore, 1/2 of the progeny will have black fur and long tails.

Black Fur in Mice (B)is Dominant to Brown Fur (B)