Toxins produced by genes cryllAb and crylAb control:

Options

A. Corn borer and cotton bollworm respectively
B. Tobacco bud worms and Cotton bollworm respectively
C. Cotton bollworms and corn borer respectively
D. Cotton bollworm and tobacco bud worms respectively

Answer

To answer the question regarding the toxins produced by genes Cry1Ab and Cry2Ab, we need to analyze the information provided in the transcript step by step.

### Step-by-Step Solution:

1. **Understanding the Genes**: The genes mentioned, Cry1Ab and Cry2Ab, are derived from the bacterium *Bacillus thuringiensis* (Bt). These genes encode for insecticidal proteins that are effective against specific insect pests.

2. **Identifying the Insects**: According to the transcript, Cry1Ab and Cry2Ab target specific insects:
- Cry1Ab is known to control the corn borer.
- Cry2Ab is known to control the cotton bollworm.

3. **Matching the Options**: The question provides several options regarding which insects are controlled by these genes. Based on the information:
- Cry1Ab controls the corn borer.
- Cry2Ab controls the cotton bollworm.

4. **Conclusion**: Therefore, the correct answer to the question "Toxins produced by genes Cry1Ab and Cry2Ab control:" is:
- **Corn borer and cotton bollworm respectively.**

### Final Answer:
Toxins produced by genes Cry1Ab and Cry2Ab control corn borer and cotton bollworm respectively.