In Sweet Peas, Genes C and P Are Necessary for Colored

Essay

In sweet peas, genes C and P are necessary for colored flowers.In the absence of either (__ pp or cc __) or both (cc pp), the flowers are white.What will be the color of the offspring of the crosses listed below and in what proportions?
(a)
Cc Pp * cc pp
(b)
Cc Pp *Cc Pp
(c)
Cc PP * Cc pp
(d)
Cc pp * cc Pp