sentences:  Prehistoric groups in this area are characterized by agricultural villages and large ceremonial and politico-religious capitals This culture area included some of the most complex and advanced cultures of the Americas, including the Olmec, Teotihuacan, the Maya, and the Aztec.Molecular genetics study suggests that "surviving" Amerindian populations derived from a theoretical single founding population, possibly from only 50 to 70 genetic contributors Preliminary research, restricted to only 9 genomic regions (or loci) have shown a genetic link between original Americas and Asia populations.The study does not address the question of separate migrations for these groups, and excludes other DNA data-sets.