In Mendel’s experiment with garden pea, round seed shape is dominant over wrinkled seeds, yellow cotyledon is dominant over green cotyledons. When a pea plant with genotype RrYy is crossed with the one having genotype Rryy, what are the expected phenotypes in the resultant cross. 

detailed solution

Correct option is D

If the pea plant with RrYy genotype is crossed with the plant with Rryy genotype, there is formation of 4 types of female gametes with genotypes as RY, Ry, rY and ry. In the male parent with Rryy genotype two types of gametes with genotypes as Ry and ry are formed. Due to random fertilization there is formation of round and yellow seeded plants with genotypes as RrYy and RRYy, round and green with RRyy, Rryy genotypes, wrinkled yellow with genotypes rrYy and wrinkled and green with genotype as rryy.