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?