[Campbell Biology P.552] According to the provided map and text, which of the following stat... | Practice Question

According to the provided map and text, which of the following statements is true regarding the distribution of sickle-cell allele frequency and malaria?

  • A: Regions with high frequencies of the sickle-cell allele generally coincide with areas of high malaria distribution.
  • B: Malaria is primarily caused by a bacterium carried by mosquitoes.
  • C: The highest frequency of the sickle-cell allele shown on the map is between 9.0-12.0%.
  • D: The map shows that the sickle-cell allele is most prevalent in North America.

Explanation

The map visually demonstrates a clear overlap between regions with high frequencies of the sickle-cell allele and areas where malaria is prevalent, particularly evident across sub-Saharan Africa. The text further explains this correlation through heterozygote advantage in malaria-prone regions.