During spermatogenesis how many spermatozoa are formed from a single primary spermatocyte?
(a) 1
(b) 2
(c) 4
(d) 8

Options

A. 1
B. 2
C. 4
D. 8

Answer

To solve the question of how many spermatozoa are formed from a single primary spermatocyte during spermatogenesis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Process of Spermatogenesis**:
- Spermatogenesis is the process by which sperm cells are produced from spermatogonial stem cells through a series of stages.

2. **Identify the Starting Cell**:
- The process begins with a primary spermatocyte, which is a diploid cell (2n).

3. **Meiosis I**:
- The primary spermatocyte undergoes meiosis I, which is a reduction division. This division reduces the chromosome number by half.
- As a result of meiosis I, one primary spermatocyte produces **two secondary spermatocytes**, which are haploid (n).

4. **Meiosis II**:
- Each secondary spermatocyte then undergoes meiosis II, which is an equational division. This means that the chromosome number remains the same.
- Each secondary spermatocyte divides to form **two spermatids**. Since there are two secondary spermatocytes, this results in a total of **four spermatids**.

5. **Spermatid to Spermatozoa**:
- Each spermatid then undergoes a transformation process called spermiogenesis, where they mature into spermatozoa (sperm cells).
- Therefore, from the four spermatids, we get **four spermatozoa**.

6. **Conclusion**:
- Thus, from a single primary spermatocyte, a total of **four spermatozoa** are formed.

### Final Answer:
The correct answer is (c) 4.

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