At their most benign, these reports have become the equivalent of a contemporary parlor game, especially for white Americans who make up the vast majority of the participants. But there is a sinister undertone to it all, reviving as it does a long-discredited pseudoscientific basis for racism: the notion that race, ethnicity, and ancestry are revealed in the genes and the blood, and passed down inexorably, even if invisibly, from generation to generation. Behind this lies the assumption that those genes (or variations) originate within clearly defined national or geographic borders and that they reveal something meaningful about who we are—something otherwise invisible. In this way, race and ethnicity are separated from and elevated above experience, culture, and history.As Aviva Chomsky maintains, by reviving "long-held ideas about purity and authenticity," these tests are the modern "race science" of today that has the impact of reinscribing constructions of race, as well as erasing our history with respect to "conquest, colonization, and exploitation that created not just racial inequality but race itself as a crucial category in the modern world." Read on.