Question

many different types of mutations can occur within the body. tay - sachs disease is a deadly disorder that is caused by a missing codon in the gene coding for production of the hex a enzyme in the body. which type of mutation is responsible for causing tay - sachs disease?
substitution
replacement
insertion
deletion

Explanation:

A substitution or replacement mutation involves changing one base - pair for another. An insertion mutation adds extra base - pairs. Since Tay - Sachs is caused by a missing codon (a sequence of three base - pairs), it is a deletion mutation where genetic material is lost.

Answer:

deletion