What were the PARENTS’ genotypes if we are given the following possible offspring combinations in the Punnett square?

RR Rr
Rr rr

Based on the possible offspring combinations in the Punnett square: RR, Rr, Rr, and rr, we can infer that one parent has the genotype RR (homozygous dominant) and the other parent has the genotype Rr (heterozygous).