The proteins encoded by the genes cryiAb and cryllAb controls respectively

Options

A. Corn borer and Cotton boll worm
B. Cotton borer and Corn borer
C. Cotton boll worm and Bhendi fruit borer
D. Bhendi fruit borer and Cotton boll worm

Answer

To answer the question about the proteins encoded by the genes cry1Ab and cry2Ab, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Genes**: The genes in question are cry1Ab and cry2Ab. These are part of the cry gene family.

2. **Understand the Source**: Both cry1Ab and cry2Ab genes are derived from the bacterium *Bacillus thuringiensis* (commonly known as BT). This bacterium produces a toxin that is effective against certain pests.

3. **Function of Cry Genes**: The proteins encoded by these cry genes are known as BT toxins. They are insecticidal proteins that target specific pests.

4. **Identify the Target Pests**:
- **Cry1Ab**: This protein specifically targets and controls the corn borer, which is a common pest affecting corn crops.
- **Cry2Ab**: This protein is effective against the cotton bollworm, a significant pest for cotton plants.

5. **Conclusion**: Therefore, the proteins encoded by the genes cry1Ab and cry2Ab control the following:
- Cry1Ab controls the corn borer.
- Cry2Ab controls the cotton bollworm.

### Final Answer:
The proteins encoded by the genes cry1Ab and cry2Ab control respectively the corn borer and the cotton bollworm.