Question

Three crosses were carried out in pea plants with respect to flower colour violet/white (V/v) and flower position axial/terminal (A/a). Study in the table the crosses ‘a’, ‘b’ and ‘c’ where parental phenotypes and their $F_1$ progeny phenotypes are given. 
Find the genotypes of each of the parental pairs of crosses ‘a’, ‘b’ and ‘c’. 

Hint:

In dihybrid crosses, phenotypic ratios can help deduce parental genotypes based on Mendelian inheritance patterns.

Answer 1

(a) Cross: Violet, axial × White, axial Parents' Genotype: $VvAa \times vvAa$. Progeny: $6/16$ Violet, axial ($VvAa$); $2/16$ White, terminal ($vvAa$); $6/16$ Violet, axial ($VvAa$); $2/16$ Violet, axial ($VvAa$).

(b) Cross: Violet, axial × White, terminal Parents' Genotype: $VvAa \times vvaa$. Progeny: $1/4$ Violet, axial ($VvAa$); $1/4$ Violet, terminal ($Vvaa$); $1/4$ White, axial ($vvAa$); $1/4$ White, terminal ($vvaa$). 

(c) Cross: Violet, axial × Violet, axial Parents' Genotype: $VvAa \times VvAa$. Progeny: $3/4$ Violet, axial ($VvAa$); $1/4$ White, axial ($vvAa$).