For some, the emerging details of the genome sequence are most fascinating for what they say about the fraternity between the human species and all other creatures on earth. You can see the same genes in flies, worms, monkeys mice and people. It's evolution laid out for all to see. There's nothing peculiar or distinctive about us. Except, perhaps, for our species-wide homogeneity.
Some scientists emphasize the genetic fraternity of humanity.
But the myth of major genetic differences across 'races' is nonetheless worth dismissing with genetic evidence. Scientists are also falling over each other for the prize of aptest analogy. I've used quite a few of them myself. That doesn't convey what we have. Because we don't just have the linear sequence, we have the physical parts, too.