What the genomes record of Iberian settlement in the Americas

Population genomics has given the mestizaje argument an evidentiary base that neither chronicles nor polemic could supply: Native American ancestry that tracks pre-Columbian population density, admixture dated six to fourteen generations back, a repeated sex asymmetry with European ancestry weighted to the male line, and a widespread Sephardic component. The genomes record that mixture happened and cannot settle the terms on which it did.