The lagest normal metaphasic chromosome has a size of

Options

A. `1 mu m`
B. `10 mu m`
C. `20 mu m`
D. `30 mu m`

Answer

To solve the question regarding the size of the largest normal metaphasic chromosome, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chromosome Structure**:
- Chromosomes are structures within cells that contain DNA. They are most condensed during metaphase, which is a stage of cell division.

2. **Identifying the Size of Metaphasic Chromosomes**:
- During metaphase, chromosomes are at their most condensed state, making them easier to observe under a microscope.

3. **Reviewing the Options**:
- The options given are:
- 1 micrometer
- 10 micrometer
- 20 micrometer
- 30 micrometer

4. **Researching Known Sizes**:
- It is known from biological studies that the largest normal metaphasic chromosome can reach a size of approximately 30 micrometers.

5. **Conclusion**:
- Based on the information, the largest normal metaphasic chromosome has a size of **30 micrometers**.

### Final Answer:
The largest normal metaphasic chromosome has a size of **30 micrometers**.

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