Question

the illustration below shows two adult rabbits and their offspring.

in rabbits, the allele for spots is dominant to the allele for solid color. what is the most likely genotype of the parent rabbits in the illustration?

options (partially visible):

• first option
• rr x rr (highlighted)
• rr x rr
• rrr x rr

Explanation:

Step1: Analyze the offspring

Since the allele for spots (let's assume \(S\)) is dominant to the allele for solid color (\(s\)), and there are offspring with solid - color (genotype \(ss\)).

Step2: Determine the parents' genotypes

For two parents to have offspring with \(ss\) genotype, each parent must contribute an \(s\) allele. Also, since one of the parents has spots, its genotype must be \(Ss\) (because if it was \(SS\), it couldn't produce \(ss\) offspring). And the other parent (solid - colored) has genotype \(ss\).

Answer:

\(Ss\times ss\)