Question

The gene which is responsible for the control of cotton bollworm is:

• A. Cry 1 Ab
• B. Cry1 Ac
• C. Cry1 3A
• D. Cry 4 gene

Hint:

Bt genes:
- Cry1Ac: Cotton bollworm (Helicoverpa).
- Cry1Ab: European corn borer.
- Cry3A: Colorado potato beetle.
- Cry4: Mosquitoes.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
This question tests knowledge of Bt genes and their target pests.

Step 2: Detailed Explanation:
Cry1Ac is the gene responsible for the control of cotton bollworm (Helicoverpa armigera).
It is used in Bt cotton to confer resistance to bollworms.
Cry1Ab (A): Effective against European corn borer.
Cry1 3A (C): Effective against Colorado potato beetle.
Cry 4 gene (D): Effective against mosquitoes.
Thus, Cry1Ac controls cotton bollworm.

Step 3: Final Answer:
Thus, the gene responsible for the control of cotton bollworm is Cry1Ac, which corresponds to option (B).
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