Meiosis occurs in

Options

A. Primary spermatocytes
B. Secondary espermatocytes
C. Both A and B
D. Spermatogonia.

Answer

**Step-by-Step Solution:**

1. **Understanding Meiosis**: Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four haploid cells from one diploid cell. It is essential for sexual reproduction.

2. **Identifying the Cell Types**: The question asks where meiosis occurs. The options provided are:
- A) Primary oocyte
- B) Secondary oocyte
- C) Both A and B
- D) Spermatogonia

3. **Analyzing Primary Oocyte**: A primary oocyte is a diploid cell (2n), meaning it has two sets of chromosomes (in humans, 46 chromosomes). It undergoes the first meiotic division to form two haploid cells.

4. **Analyzing Secondary Oocyte**: A secondary oocyte is formed from the primary oocyte after the first meiotic division. It is also haploid (n), containing one set of chromosomes (23 chromosomes in humans). This cell can undergo the second meiotic division.

5. **Conclusion on Meiosis Occurrence**: Since meiosis occurs in both the primary oocyte (during the first meiotic division) and the secondary oocyte (during the second meiotic division), we conclude that meiosis occurs in both A and B.

6. **Final Answer**: Therefore, the correct answer is option C) Both A and B.

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