[Campbell Biology P.829] According to the ABC hypothesis, which genes are expressed in the w... | Practice Question

According to the ABC hypothesis, which genes are expressed in the whorl that develops into petals?

  • A: Only A
  • B: Only B
  • C: Only C
  • D: A and B
  • E: B and C

Explanation

According to the ABC hypothesis, A genes are active in the two outer whorls sepals and petals , and B genes are active in the two middle whorls petals and stamens . Therefore, petals develop where both A and B genes are active.