The Human Genome Project

The Human Genome Project (HGP) is a project undertaken by James D. Watson with a goal to understand the genetic make-up of the human species by determining the DNA sequence of the human genome and the genome of a few model organisms. The project began in 1990 and, by some definitions, it was completed in 2003. It was one of the biggest investigational projects in the history of science. The mapping of the human genes was an important step in the development of medicines and other aspects of health care.
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.