Explain how you could determine whether the seeds in a packet of round pea seeds have the genotype Rr or RR, in which R represents round seeds and r represents wrinkled seeds?

Answer 1

plant the seeds. If you get wrinkled seeds in any of the offspring, then there was a Rr genotype. It takes a rr to get wrinkled. About 1/4 in a cross of Rr x Rr should be rr.