Cystic fibrosis is a genetic disease caused by a recessive allele. The membrane protein involved in cystic fibrosis confers resistance to typhoid fever. Imagine that a drug- resistant form of typhoid fever becomes common worldwide, killing a significant proportion of the human population over a period of several decades. Which of the following would you expect to observe in the world population during this period?

Question

Quizplus · Accepted Answer

The membrane protein involved in cystic fibrosis confers resistance to typhoid fever. As drug-resistant typhoid fever becomes common, individuals with the cystic fibrosis allele will have an advantage and will be more likely to survive and reproduce. This will lead to an increase in the frequency of cystic fibrosis in the world population.

Cystic Fibrosis Is a Genetic Disease Caused by a Recessive