The HEXA gene codes for a protein that breaks down and recycles
toxic substances in our brain and spinal cord. Mutations in the HEXA gene lead to Tay-Sachs
disease. This is a disorder in which the level of toxic substances builds in the brain and spinal
cord, leading to severe brain damage and eventually death.
In many patients with Tay-Sachs, an insertion of four base pairs is seen in the HEXA gene. *In
general terms, explain how this insertion impacts the protein that is produced.*(consider the
reading frame)