Autopolyploidy can be induced artificially by

Options

A. Chloroform
B. Colchicine
C. Chloroquine
D. Taxol

Answer

### Step-by-Step Solution:

1. **Understanding Polyploidy**:
- Polyploidy refers to the condition of having more than two complete sets of chromosomes. It is a common phenomenon in plants and can lead to increased size, vigor, and adaptability.

2. **Defining Autopolyploidy**:
- Autopolyploidy is a specific type of polyploidy where the additional sets of chromosomes come from the same species. This means that the chromosome duplication occurs within the same genetic lineage.

3. **Inducing Autopolyploidy**:
- To artificially induce autopolyploidy, certain chemicals can be used to disrupt normal cell division, leading to the duplication of chromosome sets.

4. **Identifying the Correct Chemical**:
- Among the options provided (Chloroform, B-Cortisine, Chloropenine, Texol), the correct chemical that is known to induce autopolyploidy is **Colchicine**.

5. **Mechanism of Colchicine**:
- Colchicine works by inhibiting the formation of the spindle fibers during mitosis, which prevents the chromosomes from separating properly. As a result, the cell ends up with double the number of chromosomes.

6. **Conclusion**:
- Therefore, the answer to the question "Autopolyploidy can be induced artificially by" is **Colchicine**.