Saturday 23 August 2008

Animal mutation


Mutations are random changes in the genetic information of an organism. These lead to new varieties and traits in an organism. Most are harmful, but a few are neutral or even beneficial.There are two main types of genetic mutations: a point mutation and a frameshift mutation. In a point mutation, one of the bases(chemicals) in the chain of DNA is replaced by a different base. In a frameshift mutation, one base pair is "deleted," so it throws off all of the codons(triplets) in the DNA sequence, leading to different proteins that are usually useless or harmful.

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