100% black 100% white 50% black, 50% white 75% black, 25% white
I gave my students this multiple choice question: Black fur is dominant to white fur in guinea pigs. If two black guinea pigs (Bb) are crossed, what color will the fur of their offspring be?

Only one answer is correct among these 4 choices:
- 100% black
- 100% white
- 50% black, 50% white
- 75% black, 25% white

Could you tell me which one is correct?

75% black, 25% white