Which statement expresses accurately the genetic implications of cystic fibrosis (CF)?
A) If it is present in a child,both parents are carriers of this defective gene.
B) It is inherited as an autosomal dominant trait.
C) Seventy percent of individuals with CF in Canada are children.
D) There is a 50% chance that siblings of an affected child will also be affected.

Question

Quizplus · Accepted Answer

Cystic fibrosis (CF)is an autosomal recessive gene inherited from both parents.In Canada,60% of CF patients are adults,40% are children.An autosomal recessive inheritance pattern means that there is a 25% chance that a sibling will be infected,but a 50% chance a sibling will be a carrier.

Which Statement Expresses Accurately the Genetic Implications of Cystic Fibrosis