X and Y-chromosomes are

Options

A. Only morphologically similar
B. Only morphologically dissimilar
C. Morphologically as well as genetically dissimilar
D. None are correct.

Answer

**Step-by-Step Solution:**

1. **Understanding Chromosomes**:
- Chromosomes are structures within cells that contain DNA and carry genetic information. In humans, there are two types of sex chromosomes: X and Y.

2. **Morphological Differences**:
- The X and Y chromosomes are morphologically dissimilar. This means they have different shapes and sizes. The X chromosome is larger than the Y chromosome.

3. **Genetic Differences**:
- Apart from their morphological differences, X and Y chromosomes are also genetically dissimilar. This means that the genes present on these chromosomes are different. The X chromosome carries a wide range of genes, while the Y chromosome contains genes that are primarily involved in male sex determination.

4. **Conclusion**:
- Therefore, X and Y chromosomes are dissimilar both morphologically and genetically. This is the correct characterization of these chromosomes.

**Final Answer**: X and Y chromosomes are morphologically as well as genetically dissimilar.

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