In flowering plants, petals form when ____ genes are turned on.
A)only A
B)only B
C)only C
D)both A and B
E)both B and C

Question

Quizplus · Accepted Answer

Petals in flowering plants form when both A and B genes are turned on. The A gene, APETALA1 (AP1), is responsible for determining floral meristem identity and specifying the sepals and petals in the first and second whorls of the flower. The B gene, APETALA3 (AP3), along with PISTILLATA (PI), specifies the petals and stamens in the second and third whorls of the flower. Therefore, both A and B genes need to be active for petal formation.

In Flowering Plants, Petals Form When ____ Genes Are Turned