Cystic Fibrosis

Question 1

What is the inherited disorder cystic fibrosis?

Answer 1

Cystic fibrosis is a disorder of cell membranes

Answer 2

Cystic fibrosis is controlled by a single gene which has two alleles

Question 3

Is cystic fibrosis a recessive or dominant allele condition?
How is cystic fibrosis inherited?

Answer 3

Cystic fibrosis is caused by two copies of the defective allele, it is recessive (cc)

A person must inherit two copies of the defective allele to have cystic fibrosis, one from each parent.

Question 4

Will a person with one defective allele and one normal allele (Cc) have cystic fibrosis?

Answer 4

A person with heterozygous alleles (Cc) will not have cystic fibrosis, although they are a carrier of cystic fibrosis