(a) Describe the events of spermatogenesis with the help of a schematic representation.
(b) Write two differences between spermatogenesis and oogenesis.

Explanation

### Step-by-Step Solution:

#### (a) Events of Spermatogenesis

1. **Initiation of Spermatogenesis**:
- The process begins at puberty when germ cells (spermatogonia) undergo mitosis.

2. **Formation of Primary Spermatocytes**:
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