Explain how you might determine the genoytype of a purple flowering pea plant.?

please keeo simple as for a highschool bio class

Explain how you might determine the genoytype of a purple flowering pea plant.?
Use a monohybrid cross to determine the genotype. For example: P = purple and p = white so we cross PP x pp and you get the following genotype:





Pp, Pp, Pp, Pp - because P is dominant all offspring are Purple. Now, to do a second generation cross we would cross: Pp x Pp





PP, Pp, Pp, pp - We get 3 Purple and 1 white. This is also known at the F2 generation.