Gray seed colour in peas is dominant to white. Assume that Mendel conducted a series of experiments where plants with gray seeds were crossed among themselves, and the following progeny were produced: 302 gray and 98 white. a) What is the most probable genotype of each parent? b) Based on your answer in a) above, what genotypic and phenotypic ratios are expected in these progeny? Assume the following symbols: G = gray and g = white.)

Question

Quizplus · Accepted Answer

The most probable genotype for each parent is Gg (heterozygous) because the progeny includes both gray and white seeds, indicating that both parents must carry the recessive allele. Crossing two heterozygotes (Gg × Gg) typically results in a genotypic ratio of 1:2:1 (GG:Gg:gg) and a phenotypic ratio of 3:1 (gray:white), matching the observed progeny distribution.

Gray Seed Colour in Peas Is Dominant to White