In a certain species of plant, flowers occur in three colors: blue, pink, and white.A pure-breeding pink plant is mated with a pure-breeding white plant.All of the F₁ are blue.When the blue F₁ plants are selfed, the F₂ occur in the ratio 9 blue:3 pink:4 white.The genotype that produces white is ww.The presence of one W allele allows pink or blue color to occur.The alleles at the hypostatic locus are B (blue)and b (pink).What is the genotype of the pink parent?

Question

Quizplus · Accepted Answer

The pink parent must be homozygous for the pink allele (bb) and must also have the ability to produce color, which requires at least one W allele. Since the genotype for white is ww, the pink parent must have two W alleles to not be white, making the correct genotype bb WW.

In a Certain Species of Plant, Flowers Occur in Three