from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hereditary disease that affects young children almost exclusively of eastern European Jewish descent, in which an enzyme deficiency leads to the accumulation of gangliosides in the brain and nerve tissue, resulting in mental retardation, convulsions, blindness, and, ultimately, death.
After Warren Tay (1843-1927), British physician, and Bernard Sachs (1858-1944), American neurologist.(American Heritage® Dictionary of the English Language, Fourth Edition)
But a DNA test that reveals whether an embryo is destined to have Tay-Sachs disease can also be used to determine whether the embryo is male or female, or whether it carries an adult-onset-disease risk like a mutation in the BRCA1 gene.