The seemingly high percentage of genes that were similar in different races might have been directions to grow 1 nose, 2 eyes, skin, teeth, etc. I think there'd be a whole lot more basics that we take for granted. I DO believe that a lot of our definitions are based on appearance, and just because people have observable traits in common doesn't mean they have other, unobservable traits in common as well. To a large extent, race IS subjective, however -

Race may be, at least to some extent a matter of perception, but the way people are treated because of those perceptions is reality.