Natural Selection in Humans
The Malaria parasite can exert a selective pressure on populations. This pressure has led to natural selection for erythrocytes carrying the sickle cell hemoglobin gene mutation (Hb S)—causing sickle cell anaemia—in areas where malaria is a major health concern, because the condition grants some resistance to this infectious disease
Read more about this topic: Evolutionary Pressure
Famous quotes containing the words natural, selection and/or humans:
“Though a censure lies against those who are poor and proud, yet is Pride sooner to be forgiven in a poor person than in a rich one; since in the latter it is insult and arrogance; in the former, it may be a defense against temptations to dishonesty; and, if manifested on proper occasions, may indicate a natural bravery of mind, which the frowns of fortune cannot depress.”
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“The books for young people say a great deal about the selection of Friends; it is because they really have nothing to say about Friends. They mean associates and confidants merely.”
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