Answer:
Cystic fibrosis
Step-by-step explanation:
Cystic fibrosis disorder is an inherited disorder that is caused when both the parents have affected gene. It is a progressive disorder that affects the lungs, digestive and respiratory system. In this disorder, a thick and sticky wall of mucus in lungs which makes it difficult to breathe.
For this disorder, there's been no cure found till date. But according to doctors, this condition can be kept in sustainable condition by having a good nutritious diet which helps in thinning of mucus wall.
Therefore, a genetic disorder that is inherited by both the parents affected genes, from the given options is, Cystic fibrosis.