Leveraging Genomic Data to Document Within-Race Attractiveness Penalties Among Black Americans

Acknowledgments: We are grateful to Dalton Conley, Filiz Garip, Iain Mathieson, Ellis Monk, and Marissa Thompson for helpful comments. This research uses data from Add Health, funded by grant P01 HD31921 (Harris) from the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), with cooperative funding from 23 other federal agencies and foundations. Add Health is currently directed by Robert A. Hummer and funded by the National Institute on Aging cooperative agreements U01 AG071448 (Hummer) and U01AG071450 (Hummer and Aiello) at the University of North Carolina at Chapel Hill. Add Health was designed by J. Richard Udry, Peter S. Bearman, and Kathleen Mullan Harris at the University of North Carolina at Chapel Hill. No direct support was received from grant P01 HD31921 for this analysis. Information on obtaining Add Health data is available on the project website. Send correspondence to Sam Trejo, samtrejo@princeton.edu.

Significance Statement: This study provides new evidence on how racialized physical features shape social experiences within a single self-identified racial group. By using genetic similarity proportions—genetic ancestry measures that correlate with physical traits such as skin tone and facial structure—the authors show that Black Americans with higher levels of Sub-Saharan African genetic similarity are systematically rated as less physically attractive. These results reveal a form of racialized disadvantage that operates within racial categories and is not captured by typical survey measures and help explain why traditional surveys report relatively small Black–White attractiveness gaps (whereas real-world behavior shows much larger differences). More broadly, the study offers genetic similarity proportions as a new tool for exploring processes of racialization in contemporary society.