Humans differ not only at the level of DNA sequence. It has been recently discovered that humans can also differ in the number of copies of each gene. These are called copy number variants.
Keywords:cnv,copy number variants,cns,cnp,NSDL_SetSpec_BEN,21,oai:nsdl.org:2200/20090420201547791T,sebat,copy number variance,Life Science,mutation,polymorphisms,cnps,copy number variation,cshl,copy number polymorphisms,Down Syndrome,autism,chromosome,NSDL
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