If a woman given birth to triplets two identical girls and a boy the number of egg cells fertilised would be

Options

A. 3
B. 1
C. 1
D. 4

Answer

To determine the number of egg cells fertilized when a woman gives birth to triplets, consisting of two identical girls and one boy, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Identical and Non-Identical Births**:
- Identical (monozygotic) twins or triplets occur when a single fertilized egg (zygote) splits into two or more embryos.
- Non-identical (dizygotic) twins or triplets occur when multiple eggs are fertilized by separate sperm.

2. **Analyzing the Given Scenario**:
- The question states that there are two identical girls and one boy. This indicates that the two girls are identical, meaning they originated from the same fertilized egg.

3. **Identifying the Fertilization Process**:
- Since the two girls are identical, they must have come from one egg that was fertilized and then split into two embryos.
- The boy is non-identical, which means he must have originated from a separate fertilized egg.

4. **Counting the Fertilized Eggs**:
- Therefore, in this case, there is one fertilized egg that resulted in the two identical girls.
- Additionally, there is one more fertilized egg that resulted in the boy.
- This means a total of **2 fertilized eggs**.

5. **Conclusion**:
- The number of egg cells fertilized in this scenario is **2**.

### Final Answer:
The number of egg cells fertilized would be **2**.

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