Zona pellucida is synthesized by:-

Options

A. Follicle
B. Oocyte
C. Both follicle cell and oocyte
D. Granulosa cells

Answer

**Step-by-Step Solution:**

1. **Understanding Zona Pellucida**: The Zona pellucida is an extracellular layer that surrounds the female gamete (oocyte) in mammals. It plays a crucial role in fertilization and early development.

2. **Identifying the Source of Synthesis**: The question asks about the synthesis of the Zona pellucida. It is important to identify which cells are responsible for its production.

3. **Defining Oocyte**: The oocyte is the female gamete produced in the ovaries. It undergoes meiotic division to eventually form an ovum (egg).

4. **Role of Follicle Cells**: While follicle cells (specifically granulosa cells) surround the oocyte and support its development, they do not synthesize the Zona pellucida.

5. **Conclusion**: The Zona pellucida is synthesized by the oocyte itself. Therefore, the correct answer to the question is that the Zona pellucida is synthesized by the oocyte.

**Final Answer**: Zona pellucida is synthesized by the oocyte.

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