In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles ...

In garden peas, one pair of alleles controls the height
  of the plant, and a second pair of alleles controls
  flower color. The allele for tall (D) is dominant to the
  allele for dwarf (d), and the allele for purple (P) is
  dominant to the allele for white (p). A tall purple
  crossed with a tall purple produces 3/4 tall purple
  and 1/4 tall white. What is the genotype of the
  parents? What will be an ideal response?
 
 

Question 2

In garden peas, one pair of alleles controls the height
  of the plant, and a second pair of alleles controls
  flower color. The allele for tall (D) is dominant to the
  allele for dwarf (d), and the allele for purple (P) is
  dominant to the allele for white (p). A tall plant with
  purple flowers crossed with a tall plant with white
  flowers produces 3/8 tall purple, 1/8 tall white, 3/8
  dwarf purple, and 1/8 dwarf white. What is the
  genotype of the parents? What will be an ideal response?