Cystic fibrosis is autosomal recessive.This means that
A) both sexes can be affected and affected individuals and carriers pass the mutation.
B) carrier mothers pass the mutation to some of their sons, but not to their daughters.
C) each affected individual has at least one affected parent.
D) both sexes are affected because new mutations occur frequently.
E) in any particular family, only one sex can be affected.

Question

Quizplus · Accepted Answer

Autosomal recessive inheritance means that both sexes can be affected and that affected individuals and carriers can pass the mutation on to their offspring. This option correctly describes these characteristics of cystic fibrosis inheritance. Choice B is incorrect because carrier mothers can pass the mutation to both sons and daughters. Choice C is also incorrect because a person with cystic fibrosis can have two carrier parents who do not have the disease. Choice D is incorrect because cystic fibrosis is not caused by new mutations that occur frequently. Choice E is also incorrect because both sexes can be affected by cystic fibrosis in any given family.

Cystic Fibrosis Is Autosomal Recessive.This Means That