What are CF probabilities?
A.) Both parents are CF carriers 25% chance unaffected (no CF, no carrier), 50% chance unaffected carrier, 25% chance affected (CF) B.) One parent is a CF carrier and one parent has CF; 50% chance affected (CF), 50% chance unaffected carrier C.) One parent has CF and one is a noncarrier; 100% chance unaffected carrier D.) one parent is a carrier and one is a noncarrier; 50% chance unaffected (no CF, no carrier), 50% chance unaffected carrier. Illustrations can be found on this website- http://www.cysticfibrosismaleinfertility.com/Where_to_begin_carrierTesting.