Nation 23andMe DNA study traces the ‘genetic consequences’ of the trans-Atlantic slave trade July 28, 2020N'dea Yancey-Bragg, USA TODAYComments Off on 23andMe DNA study traces the ‘genetic consequences’ of the trans-Atlantic slave trade A 23andMe study compared genetic data to historical records of the trans-Atlantic slave trade. Key differences shed light on the brutality of slavery.