Polyplploidy can be produced artificially by

Options

A. colchicine
B. Inbreeding
C. Line breeding `
D. Self pollination

Answer

**Step-by-Step Solution:**

1. **Understand Polyploidy**:
- Polyploidy refers to a condition in which a cell has more than two complete sets of chromosomes. This is different from diploidy, where cells have two sets of chromosomes.

2. **Identify Methods of Inducing Polyploidy**:
- Polyploidy can be induced artificially through various methods, but one of the most common and effective methods is the use of chemical agents.

3. **Recognize the Role of Colchicine**:
- Colchicine is a chemical that inhibits the formation of spindle fibers during cell division (mitosis). This inhibition prevents the proper separation of chromosomes.

4. **Explain the Mechanism**:
- During normal cell division, spindle fibers pull chromosomes apart into daughter cells. When colchicine is applied, it disrupts this process, leading to the doubling of chromosome sets in the resulting cells.

5. **Evaluate Other Options**:
- Other methods such as self-pollination, line breeding, and inbreeding do not induce polyploidy. These methods are related to breeding techniques but do not alter the chromosome number.

6. **Conclude with the Correct Answer**:
- The correct answer to the question "Polyploidy can be produced artificially by?" is colchicine.

**Final Answer**: Polyploidy can be produced artificially by colchicine.

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