Most of the genome DNA sequencing for the Human Genome Project was done by researchers at universities and research centers in the the United States and Great Britain, with other genome DNA sequencing done independently by the private company Celera Genomics. The HGP was originally aimed at the more than three billion nucleotides contained in a haploid reference human genome. Recently several groups have announced efforts to extend this to diploid human genomes including the International HapMap Project, Applied Biosystems, Perlegen, Illumina, JCVI, Personal Genome Project, and Roche-454. The "genome" of any given individual (except for identical twins and cloned animals) is unique; mapping "the human genome" involves sequencing multiple variations of each gene. The project did not study all of the DNA found in human cells; some heterochromatic areas (about 8% of the total) remain un-sequenced.
International HGP
Initiation of the Project was the culmination of several years of work supported by the Department of Energy, in particular workshops in 1984 [1] and 1986 and a subsequent initiative the Department of Energy.[2] This 1986 report stated boldly, "The ultimate goal of this initiative is to understand the human genome" and "Knowledge of the human genome is as necessary to the continuing progress of medicine and other health sciences as knowledge of human anatomy has been for the present state of medicine." Candidate technologies were already being considered for the