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 Genotype of parents: $VvAa \times vvAa$ Explanation: $6/16$ Violet, axial: $VvAa$ $2/16$ White, terminal: $vvAa$ $6/16$ Violet, axial: $VvAa$ $2/16$ Violet, axial: $VvAa$ 

(b) Cross: Violet, axial × White, terminal Genotype of parents: $VvAa \times vvaa$ Explanation: $1/4$ Violet, axial: $VvAa$ $1/4$ Violet, terminal: $Vvaa$ $1/4$ White, axial: $vvAa$ $1/4$ White, terminal: $vvaa$ 

(c) Cross: Violet, axial × Violet, axial Genotype of parents: $VvAa \times VvAa$ Explanation: $3/4$ Violet, axial: $VvAa$ $1/4$ White, axial: $vvAa$