Anthro 1 paper

Anthro 1 paper - Butler 1 Brock Butler TA: Steve Schwortz...

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Butler 1 Brock Butler TA: Steve Schwortz T: 1:10 11/13/08 Sickle cell anemia has a history of being an epidemic in certain populations, and a great tool for survival in others. This subject is very important to the field of human evolutionary biology because it is a perfect example of a population evolving and the body developing in a way that prevents diseases that are carried by the red blood cells, like malaria. Sickle cell anemia is looked at as a disease in the United States and in modern countries around the world, but it could also be looked at as an insurance policy for people living in countries where malaria is a big problem. People with normal hemoglobin are susceptible to death from malaria. People with sickle cell disease are susceptible to death from the complications of sickle cell disease. People with sickle cell trait, who have one gene for hemoglobin A and one gene for hemoglobin S, have a greater chance of surviving malaria and do not suffer adverse consequences from the hemoglobin S gene. This mutation of the red blood cell is a perfect demonstration of how natural selection acts in a population where malaria is a prevalent threat. First, one must look at what sickle cell anemia means and where it is thought to have started. Sickle cell anemia is a genetic trait passed down from generation to generation. Sickle cell anemia, named that way because the red blood cells elongate and look “sickle shaped”, is most prevalent in the southern countries of Africa. To be exact, sickle cell anemia is a blood disorder that is distinguished by the elongated, unnatural red blood cells that don’t transport oxygen nearly as well as normal red blood cells. Thus resulting in periodic painful attacks, and a
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This note was uploaded on 08/18/2009 for the course CHI CHI 10 taught by Professor Xicogonzalez during the Summer '09 term at UC Davis.

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Anthro 1 paper - Butler 1 Brock Butler TA: Steve Schwortz...

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