A plant grown from a [round, yellow] seed is crossed with a plant grown from a [wrinkled, yellow] seed. This cross produces four progeny types in the F1: [round, yellow], [wrinkled, yellow], [round, green], and [wrinkled, green]. Use this information to deduce the genotypes of the parent plants.

AaBb x aaBb

or

aaBb x AaBb

Explanation:

A - round seed

a - Wrinkled seed

B - Yellow seed

b - Green seed

P: AaBb x aaBb

G: AB, Ab, aB, ab x aB, ab

F1: AaBB, 2AaBb, Aabb, aaBB, 2aaBb, aabb

AB Ab aB ab

aB AaBB AaBb aaBB aaBb

ab AaBb Aabb aaBb aabb

OR

A - Wrinkled seed

a - Round seed

B - Yellow seed

b - Green seed

P: aaBb x AaBb

G: aB, ab x AB, Ab, aB, ab

F1: AaBB, 2AaBb, Aabb, aaBB, 2aaBb, aabb

aB ab

AB AaBB AaBb

Ab AaBb Aabb

aB aaBB aaBb

ab aaBb aabb