Sperms and ova are

Options

A. Ectodermal in origin
B. Mesodermal in origin
C. Endodermal in origin
D. All of the above

Answer

### Step-by-Step Solution:

1. **Understanding the Terms**:
- Sperm is the male gamete, and it is motile.
- Ova (or egg) is the female gamete, and it is non-motile.

2. **Identifying Germ Layers**:
- In human development, there are three primary germ layers: ectoderm, mesoderm, and endoderm.
- Each germ layer gives rise to different tissues and organs in the body.

3. **Determining the Origin of Gametes**:
- Both sperm and ova are derived from the mesoderm.
- The mesoderm is responsible for forming various structures, including the reproductive system.

4. **Evaluating the Options**:
- **Option A**: Ectodermal in origin - This is incorrect as ectoderm primarily forms the skin and nervous system.
- **Option B**: Mesodermal in origin - This is correct since both sperm and ova originate from the mesoderm.
- **Option C**: Endodermal in origin - This is incorrect as endoderm mainly forms internal organs.
- **Option D**: All of the above - This is also incorrect as only option B is correct.

5. **Conclusion**:
- The correct answer is **Option B: Mesodermal in origin**.