In peas, round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant to green seeds (y). Two plants with the genotype RrYy are crossed. What is the probability that a randomly selected offspring will have wrinkled, green seeds?

Core Concept

To have wrinkled, green seeds, the offspring must be homozygous recessive for both traits (rryy). The probability of inheriting 'rr' from an Rr x Rr cross is 1/4, and the probability of inheriting 'yy' from a Yy x Yy cross is 1/4. Multiplying these independent probabilities (1/4 × 1/4) results in a 1/16 probability.