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Tay-Sachs disease is an inherited genetic disorder in which the gene sequence codes for an enzyme involved in lipid metabolism. Accumulation of lipids in the brain leads to seizures, blindness, loss of neural function, and early death. People can be carriers of this disease and only homozygotic offspring will die from this disorder.
-When the enzyme structure of a heterozygote carrier is examined, there is an equal number of functioning and non-functioning enzymes produced. This is an example of

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In Tay-Sachs disease, the heterozygote carriers produce both functioning and non-functioning enzymes equally, which is an example of co-dominance, where both alleles are expressed equally in the phenotype.

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