Two phenotypically normal parents have six children. one daughter and one son have a particular genetic disease. this would be the expected situation for Cystic fibrosis.
Cystic fibrosis is an inherited condition that causes sticky mucus to build up in the lungs and digestive system. This causes lung infections and problems with digesting food.
Learn more about genetic disorder
https://brainly.com/question/1100281
#SPJ4