Question

cystic fibrosis is an inherited disorder that is caused when three bases are accidentally removed from the cftr gene. which of the following is true about cystic fibrosis? (1 point)
it is not known why cystic fibrosis happens in people.
cystic fibrosis is a silent disorder, it has no symptoms.
cystic fibrosis is caused by a deletion mutation.
the affects of cystic fibrosis only impact women.

Explanation:

The question states that cystic fibrosis is caused by the removal of three bases from the CFTR gene. This is a deletion mutation. The first option is incorrect as the cause (deletion mutation) is given. The second option is wrong as cystic fibrosis has symptoms like breathing difficulties. The fourth option is incorrect as it affects both genders.

Answer:

C. Cystic fibrosis is caused by a deletion mutation.