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

Options

A. spermatids
B. spermatogonia
C. primary spermatocytes
D. secondary spermatocytes.

Answer

To answer the question regarding the differentiation of male germ cells at the end of the first meiotic division in humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Male Germ Cells**: The male germ cells are known as spermatogonia. They are the immature precursor cells that undergo several stages of development to form mature sperm.

**Hint**: Remember that spermatogonia are the starting point of sperm development.

2. **Location of Spermatogenesis**: Spermatogenesis occurs in the seminiferous tubules of the testes, which are the primary sex organs in males.

**Hint**: The testes are crucial for the production of male gametes.

3. **Mitosis of Spermatogonia**: Spermatogonia undergo mitotic divisions to increase their numbers. Some of these cells will differentiate into primary spermatocytes.

**Hint**: Mitosis is the process that allows for cell multiplication.

4. **Formation of Primary Spermatocytes**: The primary spermatocytes are diploid (2n) cells formed from spermatogonia. They are the cells that will undergo meiosis.

**Hint**: Primary spermatocytes are still diploid and ready for the next stage.

5. **First Meiotic Division**: The primary spermatocytes undergo the first meiotic division (reduction division), which results in the formation of two secondary spermatocytes.

**Hint**: The first meiotic division reduces the chromosome number, leading to haploid cells.

6. **Outcome of the First Meiotic Division**: At the end of the first meiotic division, the primary spermatocyte produces two haploid secondary spermatocytes.

**Hint**: Focus on the fact that after the first meiotic division, the cells are now haploid.

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

### Summary:
- Male germ cells (spermatogonia) undergo mitosis.
- They develop into diploid primary spermatocytes.
- Primary spermatocytes undergo the first meiotic division.
- This division results in two haploid secondary spermatocytes.