The Human Genome Project is expected to produce a sequence of DNA representing the evolutionary history of the human species. This map of chromosome II of the nematode worm (a free living or parasitic worm) was made at the Medical Research Council Laboratory of Molecular Biology in Cambridge, on 2 February 1989. Maps like these plot the position of certain known genes and are preliminary to sequencing the entire genome. The announcement of the genetic sequence of the tiny nematode worm in December 1998 made it the first animal to be entirely characterised genetically. In 2002 John Sulston, Sydney Brenner and Robert Horvitz received the Nobel Prize for Physiology applied to Medicine for their work on the worm.
© Science Museum / Science & Society Picture Library