Oogonesis different from spermatogenesis in the following aspect

Options

A. a reproduction division
B. haploid gametes are formed
C. the process initiated during the embryonic stage
D. a non reduction division

Answer

### Step-by-Step Solution:

1. **Understanding Oogenesis and Spermatogenesis**:
- Oogenesis is the process of female gamete (ovum) formation, which occurs in the ovaries.
- Spermatogenesis is the process of male gamete (sperm) formation, which occurs in the testes.

2. **Analyzing the Options**:
- **Option 1**: Same reproductive division.
- Both processes involve meiosis, which is a type of reproductive division. Therefore, this option does not differentiate between the two.

- **Option 2**: Same haploid gametes are formed.
- Both oogenesis and spermatogenesis result in haploid gametes (one set of chromosomes). Hence, this option also does not differentiate between the two.

- **Option 3**: The process is initiated during the embryonic stage.
- Oogenesis begins during the embryonic development of females, where oocytes are formed and remain inactive until puberty. In contrast, spermatogenesis begins at puberty in males. This is a significant difference.

- **Option 4**: A non-reduction division.
- Both processes involve reduction division (meiosis), so this option is incorrect as it does not differentiate between the two.

3. **Conclusion**:
- The correct answer is **Option 3**: Oogenesis is initiated during the embryonic stage, while spermatogenesis starts at puberty.