Mutation of the A group gene in Arabidopsis thaliana affects development in its flower's
A) first whorl only.
B) second whorl only.
C) third whorl only.
D) first and second whorls.
E) second and third whorls.

Question

Quizplus · Accepted Answer

The A group gene in Arabidopsis thaliana affects the development of the first and second whorls of its flowers, which include sepals/petals and petals/stamens respectively. It does not affect the development of the third whorl, which consists of only stamens. Therefore, the correct choice is D: first and second whorls.

Mutation of the a Group Gene in Arabidopsis Thaliana Affects