There is trisomey of chromosome 13 which is characterised by mental retardation sloping forehead, deformed face, polydactyly, cardiac defects ,etc The syndrome is

Options

A. Klinefelter's syndrome
B. Patau's syndrome
C. Edward's syndrome f
D. Turner's syndrome.

Answer

**Step-by-Step Solution:**

1. **Identify the Condition**: The question describes a genetic condition characterized by mental retardation, sloping forehead, deformed face, polydactyly, and cardiac defects.

2. **Understand Chromosomal Abnormalities**: The condition is specified as "trisomy of chromosome 13." This means there are three copies of chromosome 13 instead of the normal two.

3. **Recall Syndromes Associated with Chromosomal Trisomy**:
- Klinefelter's syndrome is associated with an extra X chromosome (XXY).
- Edwards syndrome is associated with trisomy of chromosome 18.
- Turner’s syndrome is characterized by a missing X chromosome in females (X0).

4. **Identify the Correct Syndrome**: The only syndrome associated with trisomy of chromosome 13 is **Patau's syndrome**.

5. **Conclusion**: Therefore, the syndrome characterized by the symptoms mentioned in the question is **Patau's syndrome**.

**Final Answer**: Patau's syndrome.

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