What were the PARENTS’ genotypes if we are given the following possible offspring combinations in the Punnett square?
RR and rr
Rr and Rr
Rr and RR
rr and Rr
If we are given the following possible offspring combinations in the Punnett square, we can determine the genotypes of the parents as follows:
1) RR and rr:
In this case, all offspring will have the genotype Rr. This means that one parent (RR) must have two dominant alleles (R), and the other parent (rr) must have two recessive alleles (r).
2) Rr and Rr:
In this case, we will have a genotypic ratio of 1 RR: 2 Rr: 1 rr. This means that both parents are heterozygous (Rr) for the given trait.
3) Rr and RR:
In this case, we will have a genotypic ratio of 2 RR: 2 Rr. This means that one parent (Rr) is heterozygous and the other parent (RR) is homozygous dominant.
4) rr and Rr:
In this case, all offspring will have the genotype Rr. This means that one parent (rr) must have two recessive alleles (r), and the other parent (Rr) is heterozygous.