Question

If apurple pea plant PPis crossed with a white coloured pea plant pp will we have white flowered pea plant in the F1 generation

Answer 1

Pp
purple in f1 generation
if purple is dominant

Answer 2

No we don't

PP Indicates that P is a dominant allele therefore purple is the dominant trait

In the F1 generation we will find the genotype of all the offspring Pp

So all of them will be purple

Only because purple being dominant can also express itself in a heterogeneous allele state.

Hope it helps