A man a inherit his X chromosome from

Answer

To solve the question "A man inherits his X chromosome from," let's break it down step by step.

### Step-by-Step Solution:

1. **Understanding Chromosome Inheritance**:
- Males have one X and one Y chromosome (XY), while females have two X chromosomes (XX).
- A male inherits his Y chromosome from his father and his X chromosome from his mother.

2. **Identifying the Source of the X Chromosome**:
- Since a man inherits his X chromosome from his mother, we need to trace back where the mother got her X chromosome.
- The mother (XX) receives one X chromosome from her father (maternal grandfather) and one X chromosome from her mother (maternal grandmother).

3. **Analyzing the Options**:
- The options given are:
- Paternal grandfather
- Paternal grandmother
- Mother
- Maternal grandfather
- Maternal grandmother
- Since the man inherits his X chromosome from his mother, we need to consider where she got her X chromosome from.

4. **Conclusion**:
- The X chromosome that the man inherits comes from his mother, who received it from either her father (maternal grandfather) or her mother (maternal grandmother).
- Therefore, the correct answer is **maternal grandfather or maternal grandmother**.

### Final Answer:
A man inherits his X chromosome from his **maternal grandfather or maternal grandmother**.

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