What did the Human Genome Project find?
We now know that our genome contains about 3.2 billion A, C, G and T bases – the molecules that help make up the DNA code. An average-sized gene has about 3000 of these bases, though some genes are smaller and some are much bigger. The biggest known human gene, dystrophin, is made up of about 2.4 million bases. The Human Genome Project also gave us more detailed information about chromosomes. It turns out that chromosome 1 contains the most genes – 3168, while the Y chromosome has the fewest – about 344.