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Tay–Sachs disease is caused by a genetic mutation in the HEXA gene on (human) chromosome 15. It is a rare autosomal recessive genetic disorder. And not sex-linked.
it causes a progressive deterioration of nerve cells and of mental and physical abilities that begins around six months of age and usually results in death by the age of four. Two Tay–Sachs alleles are required for an individual to exhibit symptoms of the disease. This means that both parents must be carriers.

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Q: Which disease is an inherited condition characterized by the absence of a single lysosomal enzyme called Hex A?
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