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What is an example of how the evolutionary process of natural selection has resulted in...

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gp8976 | Student, Grade 10 | Honors

Posted August 3, 2010 at 9:56 AM via web

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What is an example of how the evolutionary process of natural selection has resulted in immunity to certian diseases?

This can be found in chapter 11

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william1941 | College Teacher | Valedictorian

Posted September 13, 2010 at 4:39 PM (Answer #1)

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The evolutionary process of natural selection ensures that when a disease afflicts a group of people, those who do not have the genes that provide them protection against the disease die; and the ones left alive pass on to their offspring genetic traits which are different and which allow their bodies to protect them from the disease.

Some examples of these genetic defenses include the presence of the sickle-cell gene in African blacks that protects them from malaria, the Tay-Sachs gene in Ashkenazi Jews which protects them from tuberculosis and the cystic fibrosis gene which protects northern Europeans from bacterial diarrhoea. (Diamond, Jared, 1997, Guns, Germs, and Steel: The Fates of Human Societies, p. 201)

 

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theevictoriaa | Student, Grade 10 | eNoter

Posted August 13, 2010 at 6:04 PM (Answer #2)

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sickle cell because people with it are immune to malaria :D

 

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