Which of the following explanations best describes the difference between cystic fibrosis and Down syndrome?
A. Down syndrome is caused by a DNA mutation, while cystic fibrosis is caused by a change in the structure of a chromosome.
B. Down syndrome is caused by change in the number of a chromosome, while cystic fibrosis is caused by a DNA mutation.
C. Down syndrome is caused by a change in the number of a chromosome, while cystic fibrosis is caused by a change in the structure of a chromosome.
D. Down syndrome is caused by a DNA mutation, while cystic fibrosis is caused by a change in the number of a chromosome.
