What would you expect to happen if you added activity B to whorl 1 in an Arabidopsis floral meristem?
A)You would get a flower with extra petals, but no sepals.
B)You would get a flower with extra sepals, but no petals.
C)You would get a flower with extra stamens, but no sepals.
D)You would get a flower with extra stamens, but no petals.

Question

Quizplus · Accepted Answer

Adding activity B to whorl 1 in an Arabidopsis floral meristem would lead to the development of petals instead of the normal sepals, resulting in a flower with extra petals but no sepals. This is because in the ABC model of flower development, the presence of B activity in whorl 1, which normally only expresses A activity for sepal formation, would shift the developmental fate towards petal formation.

What Would You Expect to Happen If You Added Activity