Genes tell our bodies what all of our physical features will look like—height, eye and hair color, the shape of our nose, and so much more. People have 2 copies of most genes. They get one copy from their father and one from their mother.
Sometimes mistakes or defects in genes occur. These are called mutations. Some mutations may keep parts of the body from working as they should. This can result in a person having certain diseases like CF.
The information in the tabs below explain:
- How family genetics determine if a person may have CF
- CF gene mutations
If you have any questions, talk to your healthcare provider.
The chances of someone having CF
Every person has 2 copies of every gene. He or she gets 1 copy from each parent.
A person without CF may have:
- 2 normal copies of the CFTR gene
- 1 normal copy of the CFTR gene and 1 copy with a mutation. This person is called a "carrier"
A person with CF has disease-causing mutations in both copies of the CFTR gene—1 from each parent.
If both parents are carriers of a disease-causing CFTR gene mutation, there is a 1-in-4 chance that their child will have CF.
Every person, whether he or she has CF or not,has a gene in the body called the Cystic Fibrosis Transmembrane Conductance Regulator. This gene is also known as the CFTR gene or the CF gene. Mutations in this gene lead to CF.
How many CFTR gene mutations are there?
Scientists have discovered approximately
mutations in the CFTR gene.
Of these, only are known to result in CF.
How many people have CF?
people worldwide and
in the US have CF.
How common are CFTR gene mutations?
The approximate number of people with CFin the United States who have at least 1 copy of these mutations:
Of those, about 12,600 have 2 copies of the F508del mutation.
Each of the following CFTRmutations occur in less than 2% of the people in the US who have CF: