A homeotic mutant flower has an arrangement (from outside in) of carpels, stamens, stamens, carpels instead of the usual sepal, petals, stamens, carpels. In general, Class A genes specify sepals, Class A and B genes specify petals, Class B and C genes specify stamens, and Class C specifies carpels. This mutant must therefore have a mutation in_________ .
A) a Class A gene
B) a Class B gene
C) a Class C gene
D) both A and B
E) both B and C

Question

Quizplus · Accepted Answer

The mutant flower has carpels where there should be sepals and petals, indicating a loss of Class A gene function, which is responsible for specifying sepals and, together with Class B, for specifying petals.

A Homeotic Mutant Flower Has an Arrangement (From Outside In)