Question

In a certain plant, rough seeds (R) are dominant and smooth seeds (r) are recessive. Two plants with genotype Rr are crossed, and their offspring has smooth seeds. What is the genotype of their offspring?

Answer 1

rr. I made a punnett square.

Answer 2

The correct answer would be rr.

The genotype of both the parents is heterozygous dominant Rr

Thus, two types of gametes would be produced by both the parents One gamete would contain R and another gamete would contain r.

The cross would offspring with three possible types of genotypes RR, Rr, and rr in ratio 1:2:1.

Thus, two types of phenotypes are possible; rough seeds (RR and Rr) and smooth seeds (rr) in the ration 3:1.

Hence, the genotype of smooth seeds would be rr.