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, natural, selection and/or humans:
“Natural selection, as it has operated in human history, favors not only the clever but the murderous.”
—Barbara Ehrenreich (b. 1941)
“I met a Californian who would
Talk California—a state so blessed
He said, in climate, none had ever died there
A natural death, and Vigilance Committees
Had had to organize to stock the graveyards
And vindicate the state’s humanity.”
—Robert Frost (1874–1963)
“It is the highest and most legitimate pride of an Englishman to have the letters M.P. written after his name. No selection from the alphabet, no doctorship, no fellowship, be it of ever so learned or royal a society, no knightship,—not though it be of the Garter,—confers so fair an honour.”
—Anthony Trollope (1815–1882)
“Here we also see: what this divinity lacks is not only a sense of shame—and there are also other reasons for conjecturing that in several respects all of the gods could learn from us humans. We humans are—more humane.”
—Friedrich Nietzsche (1844–1900)