Meiosis occurs in

Options

A. Haploid cells
B. Mostly haploid cells but occasionally diploid cells
C. Diploid cells
D. Mistly diploid cells but occasionally haploid cells

Answer

**Step-by-Step Solution:**

1. **Understanding Meiosis**: Meiosis is a type of cell division that reduces the chromosome number by half, resulting in the formation of four haploid daughter cells from one diploid parent cell.

2. **Identifying the Parent Cell**: The parent cell in meiosis is typically diploid, meaning it contains two sets of chromosomes (one from each parent).

3. **Formation of Daughter Cells**: During meiosis, the diploid parent cell undergoes two rounds of division (meiosis I and meiosis II), ultimately producing four daughter cells. Each of these daughter cells is haploid, containing only one set of chromosomes.

4. **Chromosome Number Reduction**: The key feature of meiosis is the reduction in chromosome number. Since the daughter cells are haploid, they have half the chromosome number of the diploid parent cell.

5. **Occurrence of Meiosis**: Meiosis primarily occurs in the formation of gametes (sperms and eggs) in organisms. These gametes are haploid cells, which are essential for sexual reproduction.

6. **Evaluating the Options**:
- **Option A**: "Haploid cells" - Incorrect, as meiosis cannot occur in haploid cells since they already have half the chromosome number.
- **Option B**: "Mostly haploid but occasionally diploid" - Incorrect, as meiosis primarily occurs in diploid cells.
- **Option C**: "Diploid cells mostly diploid cells but occasionally haploid" - Correct, as meiosis occurs mostly in diploid cells.

7. **Conclusion**: The correct answer is that meiosis occurs in diploid cells, primarily in the formation of gametes.

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