Answer:
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
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