ANN ARBOR --- As scientists piece together the genomes of more and more life forms---from fruit flies to humans---they're finding ample evidence that new genes have often been created through the duplication of existing genes. Of the more than 40,000 genes in the human genome, for example, about 15,000 appear to have been produced by gene duplication.
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University Of Michigan. "Gene Duplication Adapts To Changing Environment." ScienceDaily. ScienceDaily, 4 March 2002. <www.sciencedaily.com/releases/2002/03/020304081153.htm>.
University Of Michigan. (2002, March 4). Gene Duplication Adapts To Changing Environment. ScienceDaily. Retrieved April 25, 2014 from www.sciencedaily.com/releases/2002/03/020304081153.htm
University Of Michigan. "Gene Duplication Adapts To Changing Environment." ScienceDaily. www.sciencedaily.com/releases/2002/03/020304081153.htm (accessed April 25, 2014).