Morning glories can have blue, purple, or red flowers. Flowercolor is controlled by two genes. Blue color isproduced when at least one dominant allele is present atboth genes, A and B. Purpleflowers result when a dominant allele is present at only one of thetwo gene loci, A or B. Flowers arered when the plant is homozygous for two recessive allelesat each gene(i.e., aabb). Twopure-breeding purple strains are crossed, and allthe F1 plants have blue flowers.

Part A

What are the genotypes of the parental plants?

Check all that apply.

	AaBb
	aaBb
	aabb
	Aabb
	AAbb
	AABB
	AaBB
	AABb
	aaBB

Part B

If two F1 plants are crossed, what are the expectedphenotypes of the F2?

Check all that apply.

	purple
	blue
	red