Question

When pea plants from a pure-breeding strain with purple flowers are crossed with pea plants from a pure-breeding strain with white flowers, the F1 offspring all have purple flowers. However, the next generation (the F2 generation) contains plants with purple flowers and plants with white flowers.

Answer 1

Second generation offspring genotype

PP, Pp, Pp, pp

Phenotype of Second generation offspring

PP and Pp will be purple in color

and pp will be white in color

Step-by-step explanation:

Let the allele for purple color of flowers be "P" and the allele for white color of flowers be "p"

Given in F1 generation pure-breeding strain with purple flowers are crossed with pea plants from a pure-breeding strain with white flowers

Genotype of pure-breeding purple flowers be "PP"

Genotype of pure-breeding white flowers be "pp"

Genotype of offspring after first generation cross will be "Pp"

Second generation cross

Pp * Pp

PP, Pp, Pp, pp

Thus,

PP and Pp will be purple in color

and pp will be white in color