If X chromosome of sperm fertilizes an egg, what will be the chromosomes of the zygote?

Options

A. XX
B. XY
C. XO
D. YO

Answer

To solve the question "If X chromosome of sperm fertilizes an egg, what will be the chromosomes of the zygote?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Chromosomes in Gametes**:
- The egg (ovum) always contains one X chromosome. This is a fundamental characteristic of female gametes.
- The sperm can carry either an X or a Y chromosome. In this case, we are specifically looking at a sperm that carries an X chromosome.

2. **Fertilization Process**:
- When the sperm (with X chromosome) fertilizes the egg (which also has an X chromosome), the genetic material from both gametes combines.

3. **Determine the Zygote's Chromosome Composition**:
- The zygote is formed by the fusion of the sperm and the egg. Since both the sperm and the egg contribute one X chromosome each, the zygote will have two X chromosomes.

4. **Conclusion**:
- Therefore, the zygote will have the chromosome composition of XX.

5. **Identify the Gender of the Zygote**:
- Since the zygote has two X chromosomes (XX), it will develop into a female.

### Final Answer:
The chromosomes of the zygote will be **XX**.

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