Suppose a flower had normal expression of genes A and C and expression of gene B in all four whorls. Based on the ABC hypothesis, what would be the structure of that flower, starting at the outermost whorl?
A) carpel-petal-petal-carpel
B) petal-petal-stamen-stamen
C) sepal-carpel-carpel-sepal
D) sepal-sepal-carpel-carpel

Question

Quizplus · Accepted Answer

The ABC hypothesis states that the expression of genes A, B, and C in different combinations determines the identity of floral organs. In this case, the flower has normal expression of genes A and C, which means that the outermost whorl will be sepals (A), the second whorl will be petals (C), the third whorl will be stamens (B), and the innermost whorl will be carpels (C).

Suppose a Flower Had Normal Expression of Genes a and C