Salivary gland chromosomes of Chironomus are also known as

Options

A. Lampbrush chromosomes
B. Polytene chromosomes
C. Giant chromosomes
D. none of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the specific name given to the salivary gland chromosomes of Chironomus.

2. **Reviewing the Options**: We have four options to consider:
- Option 1: Lambrusch Chromosome
- Option 2: Polytene Chromosome
- Option 3: Giant Chromosomes
- Option 4: None of these

3. **Analyzing Each Option**:
- **Option 1: Lambrusch Chromosome**: This is incorrect. Lambrusch chromosomes are characterized by their large size and the presence of loops, but they are not specifically the salivary gland chromosomes of Chironomus.
- **Option 2: Polytene Chromosome**: This is the correct answer. Salivary gland chromosomes of Chironomus are indeed known as polytene chromosomes. These chromosomes are formed by the replication of DNA without cell division, leading to multiple copies of the chromosome being present in a single cell.
- **Option 3: Giant Chromosomes**: This option is also incorrect. Giant chromosomes refer to Lambrusch chromosomes and are not the same as the salivary gland chromosomes of Chironomus.
- **Option 4: None of these**: This option is incorrect as we have already identified the correct answer.

4. **Conclusion**: The salivary gland chromosomes of Chironomus are known as polytene chromosomes.

**Final Answer**: Salivary gland chromosomes of Chironomus are also known as **Polytene Chromosomes**.

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