Sex linked traits of a man are present on

Options

A. X chromosome
B. Autosomes
C. Short arm (p) of Y- chromosome
D. Long arm (q) of Y- chromsome.

Answer

**Step-by-Step Solution:**

1. **Understanding Sex-Linked Traits**:
- Sex-linked traits are those that are associated with genes located on sex chromosomes, which are the X and Y chromosomes in humans.

2. **Identifying the Chromosomes in Males**:
- Males have one X chromosome and one Y chromosome (XY). Females have two X chromosomes (XX).

3. **Analyzing the Options**:
- The question provides several options regarding where sex-linked traits of a man are present:
- A) X chromosomes
- B) Autosomes (which are not sex chromosomes)
- C) Short arm of Y chromosome
- D) Long arm of Y chromosome

4. **Eliminating Incorrect Options**:
- Option B (autosomes) can be eliminated because sex-linked traits are not located on autosomes.
- Options C and D can also be considered less likely because the Y chromosome carries fewer genes compared to the X chromosome.

5. **Focusing on the X Chromosome**:
- The X chromosome is larger than the Y chromosome and contains many more genes, including those responsible for various sex-linked traits.
- Therefore, most sex-linked traits are found on the X chromosome.

6. **Conclusion**:
- Based on the analysis, the correct answer to the question is option A, which states that sex-linked traits of a man are present on the X chromosomes.

**Final Answer**: A) X chromosomes

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