A homozygous dominant brown mouse (BB) crosses with a heterozygous brown mouse (Bb)
What percentage might be homozygous recessive (bb)?
If we draw a Punnett Square, we get BB, BB, Bb, and Bb.
Answer: 0% We don't have homozygous recessive. 50% is homozygous dominant and the other 50% is heterozygous.
