Figure 1. The continuous, category free, nature of genetic variation.

Colored dots (N=4149) are reference panel individuals from 87 populations representing ancestry from 7 continental or subcontinental regions projected onto the first two principal components of genetic similarity. Gray dots (N=31705) are participants from BioMe, a diverse biobank based in New York City. Clearly delineated continental ancestry categories, the islands of color, are shown to be a by-product of sampling strategy. They are not reflective of the diversity in this real-world dataset, made evident by the continuous sea of gray. Reproduced/modified from (12).