The presence of the disease sickle cell anemia illustrates that natural selection does not always eliminate _________ alleles.

Name: The presence of the disease sickle cell anemia illustrates that natural selection does not always eliminate _________ alleles.
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Sickle cell anemia is caused by a recessive allele. Natural selection does not eliminate it because carriers (heterozygotes) have a survival advantage against malaria, demonstrating a balanced polymorphism.

The Presence of the Disease Sickle Cell Anemia Illustrates That