Question

Which type of mutation causes cystic fibrosis?(1 point)
Responses

insertion
insertion

silent
silent

deletion
deletion

substitution

Answer 1

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