Question

In a genetic cross between two flowering plants that are heterozygous for the color trait, red flowers (R) are dominant to white flowers (r). What fraction of the offspring should have red flowers?

Answer 1

Both parent plants are heterozygous for the color trait so both their genotypes should be Rr.

Can you try making a cross between two Rr parents? And calculating the fraction of red flower offspring? (red is dominant so look for RR and Rr offspring)