Determining the order of the bases (the bars) of a fragment of DNA. The sequencing of the human genome is a research programme launched in 1990 with the aim of determining the sequence (the order) of all the genes humans possess in order to locate them and discover their function. The first data were collected in 2001 and the sequencing has now been completed, which is not to say that all the information has been decrypted. Far from it! It was in 1984 that the first sequencing of a genome took place, that of the Epstein-Barr virus.