http://www.pbs.org/wgbh/evolution/library/07/3/l_073_47.html http://www.pbs.org/wgbh/evolution/library/07/3/l_073_47.html chromosome #2, to be precise http://www.pbs.org/wgbh/evolution/library/07/3/l_073_47.html Human Chromosome 2 http://www.pbs.org/wgbh/evolution/library/07/3/l_073_47.html