1 What are the genetic compositions of two white sheep and black lamb?

-& gt； White sheep Bb, black lamb bb.

What are their chances of having a second black lamb? What about Aries?

-& gt； The probability of black lamb is 25%, and the probability of white sheep is 75%

The probability that sperm or eggs produced by Aries contain B or B is 50%.

So the situation of the offspring is bb bb, and the probability of these four situations is 25% each, while the first three are white sheep (75%) and the latter is black sheep (25%).