6. In pea plants, yellow seeds (Y) are dominant over green seeds (y). Smooth seeds (S) are dominant over wrinkled seeds (s). What proportion of the offspring would you expect to have yellow, wrinkled seeds if you crossed a plant heterozygous for both traits with a plant that was homozygous recessive for both traits? How would the proportion of the offspring change if both plants were heterozygous for both traits?.