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| Q. |
People with Down's syndrome invariably affected by: |
| A. | Huntington's disease |
| B. | Alzheimer's disease |
| C. | Meningitis |
| D. | Brain haemorrhage |
| Answer» B. Alzheimer's disease | |
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Explanation: The best-known and most common chromosome abnormality in humans is Down's syndrome, a condition associated with an extra chromosome 21. Down's syndrome individuals also almost invariably develop Alzheimer's disease, a form of dementia that is fairly common among the elderly. People with Down's syndrome develop this disease in their fourth or fifth decade of life, much sooner than other people |
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