In Mexico, EA Gap Isn’t Genetic

Analyzing 140,000 Mexico City adults with a within-family ancestry design, Wang et al. report that siblings with different Indigenous vs European ancestry have the same educational outcomes, even as height and type 2 diabetes show strong genetic ancestry signals. Measurement limits and historical schooling context likely depress EA heritability here, while diabetes risk and stature track ancestry-linked alleles. — This cautions against reading ancestry gaps as genetic in education while underscoring genetic contributions to some health risks, refining how policy and media discuss disparities.