Question

many different types of mutations can occur within the body. cystic fibrosis is a genetic disorder that is caused by different mutations within the cftr gene. one mutation in the cftr gene that leads to cystic fibrosis causes translation to end earlier in the gene sequence. which type of mutation causes this translation error that leads to cystic fibrosis?
silent
missense
nonsense
deletion

Explanation:

A nonsense mutation creates a premature stop - codon, which causes translation to end earlier. Silent mutations do not change the amino - acid sequence. Missense mutations change one amino - acid. Deletion mutations involve the loss of nucleotides.

Answer:

C. nonsense