Question

Two pea plants with yellow peas are crossed. Most of their offspring have yellow peas, but about 25 percent of the offspring have green peas. For pea color, yellow is the dominant trait and green is the recessive trait. What does this tell you about the two parent plants?

Answer 1

Answer:

Two pea plants are crossed, both are with yellow color, offspring produced are 25% with green peas, while remaining 75% are with yellow peas. It clearly describes that yellow pea color is dominant while green is recessive one.

According to the given data, the ratio of both pea colors is 3:1 of yellow to green color. According to Mendel's law of inheritance, it is only possible when both the parents are heterozygous for the pea genotype. Let the genotype for yellow color be 'Y' and that for green color is 'y'. So, the genotype of both parents would be "Yy", they will fuse to form offspring having 25% green and 75% yellow phenotype of pea color.