Meiosis takes place in Chlamydomonas in

Options

A. Zygospore
B. Zoospore
C. Hypnospores
D. Aplanospores.

Answer

**Step-by-Step Solution:**

1. **Understanding Chlamydomonas**: Chlamydomonas is a unicellular green alga that reproduces both asexually and sexually.

2. **Types of Spores**: In Chlamydomonas, there are different types of spores: zygospores, zoospores, hypnospores, and aplenospores. Each type has a specific role in reproduction.

3. **Sexual Reproduction**: During sexual reproduction in Chlamydomonas, male and female gametes fuse to form a diploid zygote.

4. **Formation of Zygospores**: The zygote develops into a zygospore, which is a thick-walled structure that can withstand unfavorable conditions.

5. **Meiosis in Zygospores**: The zygospore undergoes meiosis to produce haploid daughter cells, which will develop into new Chlamydomonas individuals.

6. **Elimination of Other Options**:
- **Zoospores**: These are motile, flagellated spores involved in asexual reproduction and do not undergo meiosis.
- **Hypnospores**: These are formed during unfavorable conditions and are also asexual, not involving meiosis.
- **Aplenospores**: These are non-motile spores that also reproduce asexually and undergo mitosis.

7. **Conclusion**: Since meiosis occurs in the zygospore after fertilization, the correct answer to the question is that meiosis takes place in the zygospore.

**Final Answer**: Meiosis takes place in Chlamydomonas in the **zygospores**.

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