Final answer:
The F2 generation from F1's Rr genotype for roundness would have a variety of genotypes and phenotypes, including round yellow seeds, wrinkled yellow seeds, round green seeds, and wrinkled green seeds.
Step-by-step explanation:
When the F1 generation plants (Rr) self-pollinate, they can produce four possible genotypes in the F2 generation: RR, Rr, rR, and rr. The phenotypes resulting from these genotypes are round yellow seeds, round green seeds, wrinkled yellow seeds, and wrinkled green seeds, respectively.
According to Mendel's experiments, the F2 generation would have a ratio of 9/16 round yellow seeds, 3/16 wrinkled yellow seeds, 3/16 round green seeds, and 1/16 wrinkled green seeds. Therefore, the F2 generation would exhibit a variety of genotypes and phenotypes.