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Definition: An allele is one of at least two forms of how a gene might be expressed. For example, the gene for human eye color might be expressed in several forms: blue, brown, green, etc. When a person has one gene for blue eyes and one gene for brown, they have two alleles of that particular gene. Evolution proceeds by the change in the how frequent alleles appear in a population over the course of time.
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Evolution & Creationism...
Is evolution a science? Is creationism a science? What is science? Is there evidence for either? Religious fundamentalists often attack evolution, but rarely from a positions of really understanding what evolution is and how it works. This FAQ will not only teach you more about the nature of evolution and evolutionary theory, but it will also explain some of the more common complaints and where they go wrong.
