The punnett square represents the dihybrid cross between two pea plants. here r represents the dominant allele for round shape of the seed and r represents the recessive allele for wrinkled shape of the seed. y represents the dominant allele for yellow seed color and y represents the recessive allele for green seed color. both the plants have the heterozygous genotype rryy. what is the expected phenotypic ratio of dihybrid crosses?