In spermatogenesis, the phase of maturation involves

Options

A. the growth of spermatogonia into primary spermatocyte
B. the formation of spermatogonia from gonocytes through mitosis
C. the formation of spermatids from primary spermatocytes meiosis
D. the formation of oogonia from the spermatocytes through meiosis.

Answer

**Step-by-Step Solution:**

1. **Understanding Spermatogenesis**: Spermatogenesis is the process of producing male gametes (sperm) in the male reproductive system, specifically in the testes.

2. **Location of Spermatogenesis**: This process occurs in the seminiferous tubules of the testes, where immature germ cells called spermatogonia are located.

3. **Initial Cell Type**: The process begins with spermatogonia, which are diploid cells (2n) that undergo mitotic division to produce more spermatogonia and some primary spermatocytes.

4. **Formation of Primary Spermatocytes**: After mitosis, the cells that develop into primary spermatocytes are still diploid (2n) because meiosis has not yet occurred.

5. **Meiosis Begins**: The primary spermatocyte undergoes the first meiotic division, resulting in the formation of secondary spermatocytes, which are haploid (n).

6. **Completion of Meiosis**: The secondary spermatocytes then undergo a second meiotic division, leading to the formation of spermatids, which are also haploid (n).

7. **Spermiogenesis**: The spermatids undergo a transformation process called spermiogenesis, where they develop into mature spermatozoa (sperm).

8. **Identifying the Phase of Maturation**: The phase of maturation in spermatogenesis refers to the stages where the diploid cells (primary spermatocytes) undergo meiosis to become haploid cells (spermatids). This occurs during the meiotic divisions.

9. **Conclusion**: Therefore, the phase of maturation in spermatogenesis is when spermatids are formed from primary spermatocytes after meiosis, specifically after the completion of both meiotic divisions.

**Final Answer**: The phase of maturation in spermatogenesis involves the formation of spermatids from primary spermatocytes after meiosis.

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