Question

in rabbits the allele for long ears (l) is dominant over the allele for short ears (l). the allele for black fur (b) is dominant over the allele for brown fur (b).if two rabbits with the genotypes llbb and llbb are crossed together, which phenotypic ratio is expected in the offspring?

Answer 1

If two rabbits with the genotypes LLbb and LLbb are crossed, all of their offspring will have long ears and brown fur, resulting in a 100% or 1:0 phenotypic ratio of long-eared, brown-fur rabbits.

Step-by-step explanation:

In rabbits, the allele for long ears (L) is dominant over the allele for short ears (l), and the allele for black fur (B) is dominant over the allele for brown fur (b). When two rabbits with the genotypes LLbb and LLbb are crossed, the expected phenotype for ears in the offspring is always long, due to the presence of the dominant L allele. However, with regards to fur color, since both parents are homozygous recessive for fur color (bb), all offspring will also have brown fur. The expected phenotypic ratio of long-eared and brown-fur offspring will be 100% or 1:0, meaning all will exhibit the same phenotype.