BBC NEWS | Science & Environment | We're all mutants, say scientists

BBC NEWS | Science & Environment | We're all mutants, say scientists: "However, next generation sequencing technology has enabled the scientists to produce a far more direct and reliable estimate.

They looked at thousands of genes in the Y chromosomes of two Chinese men. They knew the men were distantly related, having shared a common ancestor who was born in 1805.

By looking at the number of differences between the two men, and the size of the human genome, they were able to come up with an estimate of between 100 and 200 new mutations per person."