Actually, all of us are mutts. Biologically speaking, "race" is a highly flawed concept.

I have a good friend who is self identified as American Indian. His actual parentage is obscure (long story). I was discussing DNA options with him just a few days ago so that he could learn his biological antecedents. He approaches this with some trepidation because the answer might not be satisfactory.

Perhaps our DNA haplogroup could be worked into our ID number on the soon to be obligatory TSA ID microchip embedded in the left mastoid process. That ought to clean up the census data.