In pea plants the allele for purple flowers, P, is dominant over the allele for the white flowers , p, which conclusion about phenotype and genotype is possible
A. If a plant has white flowers then its genotype must be Pp
B. If a plant has purple flowers then its genotype must be PP
C. If a plant has white flowers then its genotype must must be pp
D. If a plant has purple flowers then its genotype must be Pp