Scientists estimate that a human genome has about 35,000 genes.

958 complete genomes have been sequenced to date (as at 1 March 2009 – www.genomesonline.org).

Every human cell contains 25,000–30,000 genes except for mature red blood cells, which have none.

More than 1,400 genes have been associated with disease.

Each cell in your body has an estimated 2–3 metres of DNA.