Question

in a group of deer mice, some individuals have a hairy body and others have a hairless body. in this group, the gene for the body hair trait has two alleles. the allele for a hairy body (b) is dominant over the allele for a hairless body (b). this punnett square shows a cross between two deer mice. punnett square with rows b, b and columns b, b; cells bb, bb, bb, bb what is the expected ratio of offspring with a hairless body to offspring with a hairy body? choose the most likely ratio. 0:4, 3:1, 2:2, 1:3, 4:0

Explanation:

Step1: Identify Genotypes and Phenotypes

• Genotypes: \( BB \), \( Bb \), \( Bb \), \( bb \) (from Punnett square).
• Phenotype for hairy body: \( BB \) (homozygous dominant), \( Bb \) (heterozygous) → 3 individuals (\( BB, Bb, Bb \)).
• Phenotype for hairless body: \( bb \) (homozygous recessive) → 1 individual.

Step2: Determine the Ratio

• Ratio of hairless (\( bb \)) to hairy (\( BB, Bb, Bb \)) is \( 1:3 \).

Answer:

1:3