In rabbits, long hair and black fur are produced by the dominant alleles L and B, which assort independently. The genotype ll produces short hair and the genotype bb produces white fur. A cross between a male with short, black fur and a female with long, white fur produces four offspring with short, black fur, four offspring with long, white fur, four offspring with short, white fur, and four offspring with long, black fur. What are the genotypes of the parents?

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The parents must be heterozygous for one trait and homozygous for the other to produce the observed 1:1:1:1 ratio of phenotypes in their offspring. The male with short, black fur must be llBb, and the female with long, white fur must be Llbb.

In Rabbits, Long Hair and Black Fur Are Produced by the Dominant