Grey seed colour in peas is dominant to white. Assume that Mendel conducted a series of experiments where plants with grey seeds were crossed among themselves, and the following progeny were produced: 302 grey and 98 white. What is the most probable genotype of each parent?

Question

Quizplus · Accepted Answer

The ratio of the progeny is 3:1, which is the typical ratio for a heterozygous x heterozygous cross (Gg x Gg) where G represents grey seed colour and g represents white seed colour. This means that one parent must be heterozygous (Gg), and the other parent could be either homozygous dominant (GG) or homozygous recessive (gg). Therefore, options A, C, and D are each missing one necessary genotype, while option B satisfies all possible genotypes of the parents.

Grey Seed Colour in Peas Is Dominant to White