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Tay-Sachs disease An inherited condition characterized by the absence of a single lysosomal enzyme called Hex A, which normally breaks down a membrane glycolipid called ganglioside G_M2 that is especially prevalent in nerve cells; usually occurs in children of Ashkenazi (eastern European Jewish) descent and is characterized by seizures and muscle rigidity.
A carrier is an individual who carries and is capable of passing on a genetic mutation associated with a disease and may or may not display disease symptoms. Carriers are associated with diseases inherited as recessive traits.In order to have the disease, an individual must have inherited mutated alleles from both parents. An individual having one normal allele and one mutated allele does not have the disease. Two carriers may produce children with the disease.arriers are associated with diseases inherited as recessive traits. In order to have the disease, an individual must have inherited mutated alleles from both parents. An individual having one normal allele and one mutated allele does not have the disease.