Question

round seeds and yellow seed color are dominant to wrinkled seeds and green seed color. what is the probability of having offspring that have wrinkled seeds and yellow seed color for the cross rryy × rryy?
○ 0 percent
○ 25 percent
○ 50 percent
○ 100 percent

Explanation:

Step1: Analyze seed shape genetics

The parent with genotype RRYY can only produce RY gametes (since it has two dominant R alleles for seed shape). The other parent RrYy produces gametes: RY, Ry, rY, ry. For seed shape, the cross is RR (from first parent) × Rr (from second parent). The possible genotypes for seed shape are RR and Rr, both of which result in round seeds (since R is dominant). So there's no way to get wrinkled seeds (which require rr genotype) from this cross.

Step2: Determine probability

Since wrinkled seeds (rr) can't be produced, the probability of offspring with wrinkled seeds (and any seed color) is 0. Thus, the probability of wrinkled seeds and yellow color is 0 percent.

Answer:

0 percent