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 crossBbTt×BBttwill have black fur and long tails?
Copyright @ 2010 FunnelBrain LLC. All right reserved
*SAT, AP and Advanced Placement Program are registered trademarks of the College
Board, which was not involved in the production of, and does not endorse, this