containing parts of the human genome, identifies 99.7 percent of known genes and is 99.9 percent accurate, according to the scientists. Because it is so complete it will allow scientists to search for the causes of disease and inheritable factors that predispose people to illnesses such as diabetes or cancers. Scientists also expect it to advance drug development by customising treatments to genetic profiles. Rogers said now that researchers had a refined sequence of the human genome they needed to learn more about how genes are regulated and used.