In humans, at the end of the first meiotic division, the male germ cells differentiate into the

Options

A. spermatozonia
B. Primary spermatocytes
C. secondary spermatocytes
D. spermatids

Answer

To answer the question, "In humans, at the end of the first meiotic division, the male germ cells differentiate into the," we can follow these steps:

### Step-by-Step Solution:

1. **Understand Spermatogenesis**:
- Spermatogenesis is the process of sperm formation in males. It begins with primordial germ cells that migrate to the testes.

2. **Formation of Spermatogonia**:
- The primordial germ cells differentiate into spermatogonia once they reach the testes.

3. **Mitosis of Spermatogonia**:
- At puberty, spermatogonia undergo rapid proliferation through mitosis, resulting in the formation of primary spermatocytes.

4. **Meiosis I**:
- Each primary spermatocyte undergoes the first meiotic division (meiosis I). This division is a reductional division, meaning it reduces the chromosome number by half.

5. **Formation of Secondary Spermatocytes**:
- At the end of meiosis I, each primary spermatocyte divides to form two secondary spermatocytes. This is the key step that answers the question.

6. **Conclusion**:
- Therefore, at the end of the first meiotic division, the male germ cells differentiate into secondary spermatocytes.

### Final Answer:
At the end of the first meiotic division, the male germ cells differentiate into **secondary spermatocytes**.

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