Hunting for a gene
It can take years to track down a gene: it is like trying to find a particular building in London, with just a photograph to help you. You have about 24,000 different genes, each made up of between a few hundred to a few thousand base pairs of DNA code. These genes are bundled up into 23 pairs of chromosomes, each of which carries thousands of different genes and is made up of millions of base pairs of DNA code.
