Longest phase of spermatogenesis is :-

Options

A. Multiplication phase
B. Growth phase
C. Maturation phase
D. Germinal phase

Answer

### Step-by-Step Text Solution:

1. **Understanding Spermatogenesis**:
- Spermatogenesis is the biological process through which sperm cells are produced from spermatogonia (sperm mother cells) in the male reproductive system.

2. **Phases of Spermatogenesis**:
- The process of spermatogenesis can be divided into several phases:
- **Multiplication Phase**: In this phase, spermatogonia undergo mitosis to produce more spermatogonia.
- **Growth Phase**: Spermatogonia develop into primary spermatocytes. This phase involves growth and preparation for meiosis.
- **Maturation Phase**: This phase includes meiosis, where primary spermatocytes undergo meiosis I to form secondary spermatocytes, which then undergo meiosis II to produce spermatids. The spermatids then mature into sperm.

3. **Identifying the Longest Phase**:
- Among the phases mentioned, the maturation phase is the longest. This is because it includes two rounds of meiosis (meiosis I and meiosis II) and the subsequent maturation of spermatids into sperm.

4. **Conclusion**:
- Therefore, the longest phase of spermatogenesis is the **maturation phase**.

### Answer:
The longest phase of spermatogenesis is the **maturation phase**.

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