If a homozygous black haired guinea pig (BB) is crossed with and homozygous white haired guinea pig (bb), what is the probability that an offspring will have black fur?
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4 points
75%
50%
25%
100%
The genetic cross between a homozygous black haired guinea pig (BB) and a homozygous white haired guinea pig (bb) would result in all offspring having the genotype Bb. This heterozygous genotype would give the offspring black fur, as the allele for black hair (B) is dominant over the allele for white hair (b).
Therefore, the probability of an offspring having black fur is 100%.