Last updated: November 24, 2025 Which DNA testing companies shed the most detailed light on African ancestry? What makes Africa the most genetically diverse continent? Why is it so important for scientists to understand the genetic heritage of those with...
DNA ethnicity estimates are more reliable for certain locations than others. Here’s which regions of Europe are more (and less) likely to be identified correctly. Here’s a great word: allele [uh-leel]. It refers to a specific physical location on a chromosome that can...
DNA ethnicity estimates are so complex—like the weather—that they vary for the same person even at the same testing company. Here, let us explain. Is the title of this article unsettling? Don’t worry: I think you’ll actually be relieved at the explanation by the time...
The best DNA ethnicity results—most accurate and specific—vary across testing companies. Here’s some hard data for 23andMe and AncestryDNA. In my most recent post, I explained two key metrics in DNA ethnicity estimates: precision and recall. (The M&M analogy I...
Ethnicity estimates in DNA testing are becoming more precise, accurate and consistent—but they’re still not equally robust across the market. Here’s an expert (and detailed) answer to this important question! DNA ethnicity estimates: Performance varies This article is...
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