[Scientific approaches to the Mexican mestizo].

The colonial category of mestizo was an ideological tool that shaped national identity in the post-revolutionary period in Mexico. The Indian-mestizo axis functioned to organize the ethnic and political interactions of the state. Doctors and anthropologists reinforced this dual taxonomy in studies of human populations, using biomedical markers to produce differentiated descriptions of the Indian and the mestizo. Genomic descriptions have contributed both to the construction of the scientistic notion of the mestizo based on the percentage of Indian, European and African ancestry, and also to the rise of two technoscientific objects that we call the molecular mestizo and the bioinformatic mestizo. Here we describe the interactions between the ideological and scientific incarnations of the mestizo.