Final answer:
In the context of genetics, the genotype for the red heliodor would be RR. For pea plants, a cross between RrYY and rrYy would result in genotypes of RrYy and rrYy, requiring four squares in a Punnett square analysis. A RrYY and rryy cross would yield RryY and Rryy genotypes, likewise requiring a 4-square Punnett square.
Step-by-step explanation:
The question refers to inheritance and genetics, specifically related to a fictional heliodor plant. The genotype for the red heliodor would be RR, assuming that red is a dominant trait.
In regards to pea plants, when crossing RrYY with rrYy pea plants, we should expect the genotypes to be RrYy, RrYy, rrYy, and rrYy, and the potential phenotypes to be round yellow peas and wrinkled yellow peas. To analyze this cross using a Punnett square, you would need 4 squares, since there are two different possible alleles for the R gene and two for the Y gene being considered from one parent (rrYy).
If considering a cross between RrYY and rryy, the potential genotypes would be RryY and Rryy, and the phenotypes would be round yellow peas and round green peas. This cross also requires a 4-square Punnett square for analysis.