A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds.The F₁ plants have yellow seeds.What is the expected phenotypic ratio of seed color of the offspring of an F₁ × F₁ cross?
A)1:2:1
B)2:1
C)3:1
D)9:3:3:1

Question

Quizplus · Accepted Answer

The F1 generation is heterozygous for seed color, with both Yy genotype. When these F1 plants undergo self-fertilization, the possible genotypes of offspring are YY, Yy, and yy in a 1:2:1 ratio. The phenotypic ratio is determined by the genotype: YY and Yy both produce yellow seeds, while yy produces green seeds. Therefore, the expected phenotypic ratio of yellow to green seeds in the offspring of an F1 x F1 cross is 3:1.

A Purebred Plant That Produces Yellow Seeds Is Crossed with a Purebred