Each cell in the body of a male contains one X chromosome and _____.
a) one Y chromosome
b) one X chromosome
c) one XY chromosome
d) one YY chromosome

Options

A. one Y chromosome
B. one X chromosome
C. one XY chromosome
D. one YY chromosome

Answer

To solve the question "Each cell in the body of a male contains one X chromosome and _____," we need to analyze the genetic makeup of male cells.

### Step-by-Step Solution:

1. **Understanding Chromosomes**:
- Humans have 23 pairs of chromosomes, making a total of 46 chromosomes. Each pair consists of one chromosome from each parent.
- The sex chromosomes determine an individual's sex: females have two X chromosomes (XX), while males have one X and one Y chromosome (XY).

2. **Identifying Male Chromosomes**:
- In males, each cell contains one X chromosome and one Y chromosome. This XY combination is what defines male characteristics.

3. **Evaluating the Options**:
- a) one Y chromosome: This option suggests that alongside the X chromosome, there is a Y chromosome, which is correct for males.
- b) one X chromosome: This option is incorrect because it does not account for the Y chromosome present in males.
- c) one XY chromosome: This option is misleading as it suggests a single chromosome rather than two separate ones.
- d) one YY chromosome: This option is incorrect because males do not have two Y chromosomes.

4. **Conclusion**:
- The correct answer is option (a) one Y chromosome, as each male cell contains one X chromosome and one Y chromosome.

### Final Answer:
Each cell in the body of a male contains one X chromosome and **one Y chromosome**.

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