Question

which is an example of a genetic disorder caused by a mutation in a single gene? a cystic fibrosis b typhoid c flu d none of the above

Explanation:

Cystic fibrosis is a genetic disorder caused by mutations in the CFTR gene. Typhoid is caused by the bacterium Salmonella typhi and the flu is caused by influenza viruses. Both typhoid and flu are infectious diseases, not single - gene genetic disorders.

Answer:

A. Cystic Fibrosis