Carriers of cystic fibrosis may be better able to survive diseases involving severe diarrhea. What would happen to the frequency of the recessive allele for cystic fibrosis if there was a widespread epidemic of a disease which brings about severe diarrhea?

the correct answer is 2 and 4

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.