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Genetic Variations - Essay

Genetic Variations

Charles Darwin stated that over time life could change so much so that new species are formed from a single species. But Darwin did not know where these mutations occurred. His theory could explain how humans and chimps are so alike yet different. Are we all just accidents of creation caused by mutations?
Genetic mutations occur in the DNA of an organism. They can be influenced by environment or may occur during mitosis or meiosis. Mutations have been shaping life since it began and is the cause for from one generation of a species to the next. Without mutations, life on this planet would not be possible. The ability to change is needed for life to flourish.
Hawaii's state bird, the ...

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birds were added. The chicks were released into the wild and the program continued. Though there are several dozen nenes released from captivity, there is still little increase in the wild population. The inbreeding between birds is not allowing for any genetic diversity to occur between them. It is also causing captive-bred birds to lay eggs that don't produce chicks.
Scientists collect blood samples from nenes in the area, searching for a descendant of the wild nenes. The blood is then sent to a DNA lab for fingerprinting. It shows that the captive breeding is actually harming the bird population. As expected, today's nenes have far less genetic variation than their descendants.
A mutation in the 1 of the 500 letters of the hemoglobin gene has proved to be very helpful to those in Africa who carry it. Malaria is a very deadly disease, one of the 3 deadliest in the world. Malaria is passed to humans by the anopheles mosquito, and can decimate all of the hosts blood cells in a ...

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PAPER DETAILS

Added: 5/27/2007 09:26:30 AM
Category: Science & Nature
Type: Premium Paper
Words: 751
Pages: 3

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