Gene encoding Bt protein specific for cotton bollworm is

Options

A. Cry I AC
B. Cry II Abc
C. Cry II Ac
D. Cry II Ab

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks for the gene that encodes the Bt protein specific for the cotton bollworm.

2. **Identifying the Source of Bt Protein**: The Bt protein is derived from the bacterium *Bacillus thuringiensis*. This bacterium produces proteins that are toxic to certain insects.

3. **Identifying Specific Genes**: The specific genes that encode for the Bt proteins effective against cotton bollworms are known as the Cry genes.

4. **Naming the Relevant Genes**: For cotton bollworms, the relevant Cry genes are:
- **Cry1AC**
- **Cry2AB**

5. **Conclusion**: Therefore, the gene encoding the Bt protein specific for cotton bollworm is **Cry1AC** and **Cry2AB**.

### Final Answer
The genes encoding Bt protein specific for cotton bollworm are **Cry1AC** and **Cry2AB**.

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