Originally Posted by merleniau

To Jinn and everyone else in a hubbub about race: biologically, a race is a subspecies. There are no known subspecies of humans, because geographic and sexual isolation is a requirement for defining a true genetic race. The amount of variation within a race must be smaller than the amount of variation within the parent species, something that is impossible to achieve within the constraints of cultural definitions of race.

Originally Posted by Wikipedia

In 1978, Sewall Wright suggested that human populations that have long inhabited separated parts of the world should, in general, be considered to be of different subspecies by the usual criterion that most individuals of such populations can be allocated correctly by inspection. It does not require a trained anthropologist to classify an array of Englishmen, West Africans, and Chinese with 100% accuracy by features, skin color, and type of hair in spite of so much variability within each of these groups that every individual can easily be distinguished from every other. However, it is customary to use the term race rather than subspecies for the major subdivisions of the human species as well as for minor ones.

Humans can be correctly assigned to races at much greater than 75% accuracy on the basis of morphological traits while chimpanzee subspecies are morphologically indistinct, and difficult or impossible to classify when raised in captivity.