How accurate is ancestry analysis and what are its limitations?

Updated on

The analysis is based on a statistical comparison between your DNA and the reference populations. It is more accurate for homogeneous populations with a stable genetic history, and less accurate for populations that have mixed through migration or recent historical events. 

Please bear in mind these limitations: 

  • Unrepresented populations. If your population is not included, the most genetically similar population will appear instead. 
  • Trace percentages. Due to the statistical margin of the method, small percentages of populations that are not part of your ancestry may appear. These should be disregarded. 
  • Very similar populations. Neighbouring populations with a shared history may be mistaken for one another. 
  • Subregions. We do not currently distinguish regions or provinces within a single population.