How is the genotype of the offspring different from that of the homozygous dominant parent?

Since it's been crossed with a homozygous wrinkled green, the offspring has a genotype for heterozygous round and yellow. As round and yellow are dominant traits, they're expressed in the phenotype. But when self pollinated in the f2 generation, the recessive ones will show as well

Hope it helps :')

c. would be the answer : )

explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."