Question

If a squash plant true breeding for white, disk shaped fruit is crossed with a play true breeding for yellow, sphere shaped fruit, what will the phenotypic and genotyping rations be for the F1 generation

Answer 1

The genotypic ratio for the F1 generation is 1 WW : 2 WY : 1 YY, and the phenotypic ratio is 1 white : 2 yellow.

Step-by-step explanation:

A Punnett square can be used to determine the genotypic and phenotypic ratios of the F1 generation in a cross between a squash plant true breeding for white, disk-shaped fruit and a plant true breeding for yellow, sphere-shaped fruit.

The genotype of the true-breeding white plant would be WW and the genotype of the true-breeding yellow plant would be YY. Since both characteristics are determined by dominant alleles, the genotype of the F1 generation would be WY.

Therefore, the genotypic ratio would be 1 WW : 2 WY : 1 YY, and the phenotypic ratio would be 1 white : 2 yellow.