Which statement about cystic fibrosis is true? (1 point)
A. • Carriers have an advantage over people who do not have the cystic fibrosis mutation.
B. • Cystic fibrosis is caused by a deletion of one codon in the DNA molecule.
C. • Cystic fibrosis is caused by a mutation in which a dominant allele replaces a recessive allele.
D. • Cystic fibrosis affects a person's ability to make normal red blood cells.
1 answer
D. • Cystic fibrosis affects a person's ability to make normal red blood cells.