Oogenesis comprises:

Options

A. Multiplication phase
B. Growth phase
C. Maturation phase
D. All the above

Answer

To solve the question "Oogenesis comprises:", we need to understand the different phases involved in the process of oogenesis. Here’s a step-by-step breakdown:

### Step 1: Understand Oogenesis
Oogenesis is the process of egg (ovum) formation in females. It involves several distinct phases that contribute to the development of a mature ovum.

### Step 2: Identify the Phases of Oogenesis
Oogenesis consists of three main phases:
1. **Multiplication Phase**: This is the initial phase where oogonia (the precursor cells) undergo mitosis. Mitosis is an equational division that results in the increase in the number of oogonia.

2. **Growth Phase**: After the multiplication phase, the oogonia enter the growth phase, where they develop into primary oocytes. During this phase, the primary oocytes grow in size and accumulate nutrients.

3. **Maturation Phase**: This phase involves meiosis, which is a reductional division. The primary oocyte undergoes meiosis to produce a secondary oocyte and the first polar body. The secondary oocyte can further undergo a second meiotic division to produce a mature ovum and a second polar body.

### Step 3: Conclusion
Based on the understanding of these phases, we can conclude that oogenesis comprises:
- Multiplication Phase
- Growth Phase
- Maturation Phase

Thus, the correct answer to the question "Oogenesis comprises:" is **all the above**.

### Final Answer:
Oogenesis comprises: **All the above** (Multiplication phase, Growth phase, Maturation phase).

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