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Genomes of other species have been recorded as well, such as mice,<ref>http://www.ncbi.nlm.nih.gov/genome/guide/mouse/</ref> chimpanzees<ref>http://www.nature.com/nature/focus/chimpgenome/index.html</ref> and yeast.<ref>http://www.yeastgenome.org/</ref> The mouse genome sequence from the C57BL/6J strain has about 30,000 genes, and 99% of them have direct counterparts in humans.<ref>http://www.nature.com/nature/journal/v420/n6915/full/420509a.html</ref>
Genomes of other species have been recorded as well, such as mice,<ref>http://www.ncbi.nlm.nih.gov/genome/guide/mouse/</ref> chimpanzees<ref>http://www.nature.com/nature/focus/chimpgenome/index.html</ref> and yeast.<ref>http://www.yeastgenome.org/</ref> The mouse genome sequence from the C57BL/6J strain has about 30,000 genes, and 99% of them have direct counterparts in humans.<ref>http://www.nature.com/nature/journal/v420/n6915/full/420509a.html</ref>
The chimpanzee represented the first non-human primate sequenced. The differences in the chimpanzee and human genomes are small, with 99% of the DNA sequence preserved. <ref>http://www.nih.gov/news/pr/aug2005/nhgri-31.htm</ref> The differences can be classified in terms of differences in local single nucleotide substitutions, insertions, deletions and repetitions of sequences. A relatively large number of difference between the chimpanzee and human genomes are not due to substitutions.<ref>http://207.210.67.162/~striz/docs/chimpc.pdf</ref> When this is taken into account, humans and chimpanzees still share 96% of their sequence, and are genetically closer than rats and mice.<ref>http://www.nih.gov/news/pr/aug2005/nhgri-31.htm</ref>
== References ==
== References ==