Research the following problem using a search engine such as www.altavista.com or www.google.com. Please avoid doing searches with AOL, Ask An Expert, or Ask Jeeves. They do not provide the full breadth of Websites needed to investigate scientific topics. Before pursuing this activity, first come up with a list of key words or phrases you would need to perform an accurate and concise search.
Infectious diseases are believed to be responsible for the worldwide distribution of particular genetic conditions in humans. For example, regions with high incidences of malaria also have populations that commonly have sickle-cell anemia. What information is available that explains the high occurrence of sickle-cell anemia in areas where malaria is prevalent? Is this explanation consistent with the correlation found between the prevalence of cholera and cystic fibrosis?
