In a plant species, flower color has two traits: purple flowers and white flowers. For the flower tree purple self-pollinated, giving birth to 100 plants, including 23 plants with white flowers.

a) Which trait is dominant? Explain.

b) Determine the genotype of purple-flowered plant in P and write a hybrid diagram for the above hybridization.

c) In the F1 plants, how many plants are heterozygous for flower color?