What is a pseudodeficiency allele?

It is a harmless gene change that can lower enzyme activity on a screening test without causing disease. DNA analysis can tell a pseudodeficiency allele apart from a true disease variant, which helps avoid a false carrier label. Finding one is generally reassuring.

Does a carrier result mean I have Tay-Sachs disease?

No. Carrier status is not a personal disease. MedlinePlus notes carriers are typically healthy. A genetic counselor can explain what a carrier result means for family planning.

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Genetic and Carrier Screening

Tay-Sachs Disease Mutation Analysis

A blood test that looks for HEXA gene variants linked to Tay-Sachs disease, used for carrier identification and to clarify pseudodeficiency results.