In genetics laboratories in Latin America, scientists have been mapping the genomes of local populations, seeking to locate the genetic basis of complex diseases and to trace population histories. As part of their work, geneticists often calculate the European, African, and Amerindian genetic ancestry of populations. Some researchers explicitly connect their findings to questions of national identity and racial and ethnic difference, bringing their research to bear on issues of politics and identity.
Drawing on ethnographic research in Brazil, Colombia, and Mexico, the contributors to...

In genetics laboratories in Latin America, scientists have been mapping the genomes of local populations, seeking to locate the genetic basis of complex diseases and to trace population histories. As part of their work, geneticists often calculate the European, African, and Amerindian genetic ancestry of populations. Some researchers explicitly connect their findings to questions of national identity and racial and ethnic difference, bringing their research to bear on issues of politics and identity.

Drawing on ethnographic research in Brazil, Colombia, and Mexico, the contributors to...