Cellmark Diagnostics indicated that racial typing is not done nor were they aware of a test that would provide that information. This means that there is greater variation within 'racial' groups than between them. This concept does not deter from Native identity but reflects a trend that reinforces affiliation and appears to recognize the unique cultural identities that bond various ethnic groups. Generally traits used to characterize populations are either independently inherited or show only varying degrees of association with one another within a population. Therefore the combination of these traits in an individual commonly deviates from the average combination in the population, a fact that renders untenable the idea of discrete races made up chiefly of typical representatives.
Latter observations note that racial classification by genes have no basis.
They are inherited individually, not passed on relative to group. When one looks at a number of alleles in a number of Native Americans and Europeans, however, it becomes clear that the two groups of people often differ in their variant genes. Thus, for example, the blood groups O, A, B, and AB, all genetically determined, may appear in all human populations, but often in very different proportions reflecting the frequencies of the underlying alleles. Although there are genetic differences between groups, the extent of such difference is small compared with the amount of difference found within a group. People within ethnic groups are genetically more different from each other than their group is from other groups.