Genetically inactive and higly condensed region with tighly packed DNA is

Options

A. Euchromatin
B. Heterochromatin
C. Chromatin
D. Chromosome

Answer

To answer the question "Genetically inactive and highly condensed region with tightly packed DNA is:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components**:
- The question involves terms related to DNA packaging: chromatin, heterochromatin, euchromatin, and chromosomes.

2. **Define Chromatin**:
- Chromatin is the complex of DNA and proteins (histones) that forms chromosomes within the nucleus of eukaryotic cells. It can exist in different forms.

3. **Differentiate Between Euchromatin and Heterochromatin**:
- **Euchromatin**: This form of chromatin is less condensed, more loosely packed, and is associated with actively expressed genes. It is the region where transcription occurs.
- **Heterochromatin**: In contrast, heterochromatin is tightly packed and condensed. It is generally genetically inactive, meaning that the genes in these regions are not expressed.

4. **Identify the Correct Answer**:
- The question specifically asks for a region that is both genetically inactive and highly condensed. Based on the definitions, this describes heterochromatin.

5. **Conclusion**:
- Therefore, the correct answer to the question is **heterochromatin**.

### Final Answer:
The genetically inactive and highly condensed region with tightly packed DNA is **heterochromatin**.

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