Question
If a homozygous black guinea pig ( BB ) is crossed with a homozygous white guinea pig ( bb ), what is the probability that an offspring will have black fur?
75%
25%
50%
100%
75%
25%
50%
100%
Answers
GPT-4o mini
When you cross a homozygous black guinea pig (BB) with a homozygous white guinea pig (bb), the possible genotypes of the offspring can be determined using a Punnett square.
- The BB parent can only contribute a B allele.
- The bb parent can only contribute a b allele.
Therefore, all offspring will have the genotype Bb, which means they will all express the black fur trait because the black fur (B) is dominant over the white fur (b).
So, the probability that an offspring will have black fur is **100%**.
- The BB parent can only contribute a B allele.
- The bb parent can only contribute a b allele.
Therefore, all offspring will have the genotype Bb, which means they will all express the black fur trait because the black fur (B) is dominant over the white fur (b).
So, the probability that an offspring will have black fur is **100%**.