The genetic composition of a group of 24 Yamana indians that survive i
n Puerto Williams, Navarino Island, Chile (parallel 55 south of Tierra
del Fuego), was studied Results showed that these indians have a diff
erent genetic composition than Pehuenche indians, specially for HLA sy
stem and esterase D. This fact validates the hypothesis, based on arch
eological and anthropological evidence, about the paleoindian origin o
f Yamanas.