{{Genotype
|allele1=A
|allele2=G
|iid=4000305
|magnitude=4
|repute=Bad
|summary=carrier for cystic fibrosis
}}
there is a specific medicine to treat this form

http://www.reuters.com/article/2012/01/31/us-fda-vertex-kalydeco-idUSTRE80U1JA20120131