Question

Which type of mutation causes cystic fibrosis?

a. insertion
b. silent
c. deletion
d. substitution

Answer 1

Cystic fibrosis is primarily caused by a specific type of mutation known as a deletion. The most common mutation associated with cystic fibrosis is a deletion of three nucleotides in the CFTR gene, which leads to the absence of the amino acid phenylalanine at position 508 (ΔF508).

Therefore, the correct answer is:

**c. deletion**