The number of ootids formed from one primary oocyte is :

Options

A. 4
B. 2
C. 1
D. 0

Answer

To determine the number of ootids formed from one primary oocyte, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Primary Oocyte**:
- A primary oocyte is a diploid cell (2n) that undergoes meiosis to produce gametes.

2. **Meiosis Process**:
- The primary oocyte undergoes meiosis, which consists of two divisions: meiosis I and meiosis II.
- During meiosis I, the primary oocyte divides into one secondary oocyte and one polar body.

3. **Outcome of Meiosis I**:
- The secondary oocyte is the larger cell that will eventually develop into an egg, while the polar body is a smaller cell that typically does not contribute to reproduction and usually degenerates.

4. **Meiosis II**:
- The secondary oocyte then undergoes meiosis II, which results in the formation of one ootid (mature egg) and another polar body.

5. **Final Count**:
- Therefore, from one primary oocyte, we end up with one functional ootid (egg) and two polar bodies (which do not function in reproduction).
- Hence, the total number of ootids formed from one primary oocyte is **1**.

### Conclusion:
The number of ootids formed from one primary oocyte is **1**.

---