Question

a woman has cystic fibrosis. therefore, she must have:
○ inherited a cystic fibrosis allele from both her mother and father.
○ inherited a cystic fibrosis allele from her father.
○ been exposed to air pollution.
○ she must have had asthma as a child.
○ inherited a cystic fibrosis allele from her mother.

Explanation:

Cystic fibrosis is an autosomal recessive disorder. For an individual to have an autosomal recessive disorder, they must inherit two recessive alleles (one from each parent). So, a woman with cystic fibrosis must have inherited a cystic fibrosis allele from both her mother and father. Air pollution does not cause cystic fibrosis (it is genetic). Having asthma as a child is not a cause - cystic fibrosis is due to specific gene mutations. Inheriting only from one parent (either mother or father) would make the person a carrier (heterozygous) but not affected (homozygous recessive is needed for the disorder phenotype).

Answer:

inherited a cystic fibrosis allele from both her mother and father.