Haploid cells found within the somniferous tubules of the testis are

Options

A. spermatogonia and spermatids
B. Secondary spermatocytes and spermatids
C. Secondary spermatocytes and primary spermatocytes
D. Spermatids and primary spermatocytes

Answer

To solve the question regarding haploid cells found within the seminiferous tubules of the testis, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of the Testis**:
- The testis contains structures known as seminiferous tubules, where spermatogenesis (the production of sperm) occurs.

2. **Identifying Cell Types**:
- Within the seminiferous tubules, there are different types of cells involved in the process of sperm formation:
- **Spermatogonia**: These are diploid (2n) cells that undergo mitosis to produce more spermatogonia or differentiate into primary spermatocytes.
- **Primary Spermatocytes**: These are also diploid (2n) and undergo meiosis to produce secondary spermatocytes.
- **Secondary Spermatocytes**: These are haploid (n) cells resulting from the first meiotic division of primary spermatocytes.
- **Spermatids**: These are the direct products of the second meiotic division and are also haploid (n).
- **Spermatozoa**: These are mature sperm cells derived from spermatids, and they are haploid (n).

3. **Identifying Haploid Cells**:
- The question specifically asks for haploid cells. From the above information, we can see that:
- Secondary spermatocytes (n)
- Spermatids (n)
- Spermatozoa (n)
- Therefore, the haploid cells found within the seminiferous tubules are secondary spermatocytes, spermatids, and spermatozoa.

4. **Conclusion**:
- The correct answer to the question is that the haploid cells found within the seminiferous tubules of the testis are **secondary spermatocytes and spermatids**.