What are the chances of paul and melinda having a child with fibrosis if they are both carriera?

Hi there sorry for the trouble But here what i found so Much Hope it helps?\
An individual must inherit two non-functioning CF genes — one from each parent — to have CF. If both parents are carriers there is a 1 in 4 (25 percent) chance that both will pass on the non-functioning gene, which would result in a pregnancy affected with cystic fibrosis.

Because the carnivores keep the herbivore population in check