Dr. Alondra Nelson studies gender and Black studies at the intersection of science, technology, and medicine. She is the author of numerous articles, including, “Bio Science: Genetic Genealogy Testing and the Pursuit of African Ancestry,” as well as Body and Soul: The Black Panther Party and the Fight Against Medical Discrimination and the forthcoming The Social Life of DNA. We talked to her in the Trustees’ Room at Columbia University where she is professor of sociology and gender studies and the Dean of Social Science.