Final answer:
The genotype and phenotype of the parents that produced this population are PpYY and ppYy. PpYY has purple flowers and yellow peas, while ppYy has white flowers and yellow peas.
Step-by-step explanation:
In this cross between PpYY and ppYy pea plants, the genotype of the purple-flowered parent (PpYY) is heterozygous for both flower color and pea color. The genotype of the white-flowered parent (ppYy) is recessive for flower color and heterozygous for pea color.
The phenotype of the purple-flowered plants is determined by the dominant alleles (P and Y), while the phenotype of the white-flowered plants is determined by the recessive alleles (p and y). Therefore, the genotype and phenotype of the parents that produced this population are PpYY (purple flowers, yellow peas) and ppYy (white flowers, yellow peas).