Mongolism, Patau's syndrome and Edward's syndrome are due to

Options

A. Allosomal abnormalities
B. Autosomal abnormalities
C. Both A andB
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Syndromes**: The question asks about Mongolism, Patau's syndrome, and Edward's syndrome. These are genetic disorders that arise from chromosomal abnormalities.

2. **Identifying Mongolism**: Mongolism is also known as Down syndrome. It is caused by an extra chromosome in the 21st pair, leading to a condition known as trisomy 21. This indicates that there are three copies of chromosome 21 instead of the usual two.

3. **Identifying Patau's Syndrome**: Patau's syndrome is characterized by an extra chromosome in the 13th pair. This condition arises due to an autosomal abnormality, where there is an additional genetic material from chromosome 13.

4. **Identifying Edward's Syndrome**: Edward's syndrome is caused by an extra chromosome in the 18th pair, leading to trisomy 18. Similar to the previous syndromes, this is also a result of an autosomal abnormality.

5. **Conclusion**: All three syndromes (Mongolism, Patau's syndrome, and Edward's syndrome) are caused by abnormalities in the autosomes, which are the chromosomes that are not involved in determining sex. Therefore, the correct answer is that these syndromes are due to autosomal abnormalities.

**Final Answer**: Mongolism, Patau's syndrome, and Edward's syndrome are due to autosomal abnormalities.

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