Heterochromatic region is

Options

A. Genetically more active
B. Genetically less active
C. Loosely coiled region
D. Lightly coloured region

Answer

### Step-by-Step Solution:

1. **Understanding Heterochromatin**:
- Heterochromatin refers to tightly packed forms of DNA, which are generally found in the nucleus of eukaryotic cells.

2. **Characteristics of Heterochromatin**:
- Heterochromatic regions are highly condensed and do not undergo transcription. This means that the genes located in these regions are not expressed.

3. **Replication Timing**:
- These regions are known to replicate later in the S phase of the cell cycle compared to euchromatin, which is less condensed and more transcriptionally active.

4. **Genetic Activity**:
- Since heterochromatin is not transcribed and contains fewer active genes, it is considered to be genetically less active.

5. **Conclusion**:
- Based on the characteristics and functions of heterochromatin, we conclude that the correct answer to the question is that heterochromatic regions are genetically less active.

### Final Answer:
Heterochromatic regions are genetically less active.

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