During spermatogenesis, the diploid cells are

Options

A. Primary spermatocyte and spermtogonium
B. Spermatogonium and spermatid
C. Secondary spermatocyte and spermatid.
D. Primary spermatocyte and spermatid.

Answer

**Step-by-Step Solution:**

1. **Understanding Spermatogenesis**: Spermatogenesis is the process of sperm cell development that occurs in the male reproductive system. It involves several stages of cell division and differentiation.

2. **Identifying Diploid Cells**: In the context of spermatogenesis, diploid cells are those that contain two sets of chromosomes (2n). In humans, the diploid number is 46 chromosomes.

3. **Spermatogonium**: The process begins with spermatogonia, which are the initial germ cells. These cells are diploid (2n) and undergo mitotic divisions to produce more spermatogonia or to differentiate into primary spermatocytes.

4. **Primary Spermatocytes**: The primary spermatocytes are formed from spermatogonia. They are also diploid (2n) and undergo meiosis I to produce secondary spermatocytes.

5. **Meiosis Process**: During meiosis I, the primary spermatocytes divide to form secondary spermatocytes, which are haploid (n). Then, during meiosis II, the secondary spermatocytes divide to form spermatids, which are also haploid (n).

6. **Conclusion**: The only diploid cells present during spermatogenesis are the spermatogonia and primary spermatocytes. Therefore, the correct answer to the question is option A: primary spermatocytes and spermatogonium.

**Final Answer**: Option A: primary spermatocytes and spermatogonium.

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