Final answer:
When two plants that are heterozygous for seed shape and have round seeds are crossed, there is a 25% chance that the offspring will have wrinkled seeds.
Step-by-step explanation:
When two plants that are heterozygous for seed shape (RR) are crossed, there is a 25% chance that the offspring will have wrinkled seeds. This is because the genotype for round seeds is dominant (R) over the genotype for wrinkled seeds (r), so the offspring will inherit a dominant allele from each parent.
Learn more about Probability of seed shape inheritance