<P> CF is inherited in an autosomal recessive manner . It is caused by the presence of mutations in both copies of the gene for the cystic fibrosis transmembrane conductance regulator ( CFTR ) protein . Those with a single working copy are carriers and otherwise mostly normal . CFTR is involved in production of sweat , digestive fluids , and mucus . When CFTR is not functional , secretions which are usually thin instead become thick . The condition is diagnosed by a sweat test and genetic testing . Screening of infants at birth takes place in some areas of the world . </P>
<P> CF is inherited in an autosomal recessive manner . It is caused by the presence of mutations in both copies of the gene for the cystic fibrosis transmembrane conductance regulator ( CFTR ) protein . Those with a single working copy are carriers and otherwise mostly normal . CFTR is involved in production of sweat , digestive fluids , and mucus . When CFTR is not functional , secretions which are usually thin instead become thick . The condition is diagnosed by a sweat test and genetic testing . Screening of infants at birth takes place in some areas of the world . </P>
where can the gene linked to cystic fibrosis be found
where can the gene linked to cystic fibrosis be found
( CFTR ) protein
( CFTR ) protein