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?

Question

Biology

Karla Smith

1 June, 12:39

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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Answers (1)

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Nayeli · Answer 1

Genotype of male is "llBb"

Genotype of female is "Llbb"

Explanation:

Given,

Long hair and black fur assort independently

Long hair allele is represented by "L" and short hair allele is represented by "l"

While Black color hair is represented by "B" and white color hair is represented by "b"

both "B" and "L" are dominant traits

A cross between a male with short, black fur and a female with long, white fur produces four offspring

Genotype of male is "llBb"

Genotype of female is "Llbb"

The cross between these two will give

lB lb lB lb

Lb LlBb Llbb LlBb Llbb

lb llBb llbb llBb llbb

Lb LlBb Llbb LlBb Llbb

lb llBb llbb llBb llbb

So the phenotype categorization

a) four offspring with short, black fur - llBb (4)

b) four offspring with long, white fur - Llbb (4)

c) four offspring with short, white fur - llbb (4)

d) four offspring with long, black fur - LlBb (4)