Salivary glands chromosome were discovered by Balbi- ani (1881) from the salivary glands oflarva of

Options

A. Chironomous
B. Drosophila
C. Silk worm
D. Lac worm

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the discovery of salivary gland chromosomes by Balbiani in 1881 and from which organism's larvae these chromosomes were identified.

2. **Identifying the Organisms**: The options provided are:
- A. Chironomus
- B. Drosophila
- C. Silkworm
- D. Lagworm

3. **Researching Balbiani's Work**: In 1881, Balbiani conducted research specifically on the organism Chironomus, which is a type of midge belonging to the class Insecta.

4. **Understanding Salivary Gland Chromosomes**: The chromosomes found in the salivary glands of Chironomus larvae are known as polytene chromosomes. These chromosomes are characterized by their large size and the presence of many DNA strands, making them easily observable under a microscope.

5. **Confirming the Correct Answer**: Since Balbiani's discovery was linked to the organism Chironomus, the correct answer to the question is option A, Chironomus.

6. **Conclusion**: Therefore, the salivary gland chromosomes were discovered by Balbiani from the salivary glands of larvae of Chironomus.

**Final Answer**: The correct option is A. Chironomus.

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