When comparing ancestry results between different companies, it is common to find differences in assignments. This happens mainly because each company uses its own reference populations and analysis methodologies. While all companies rely on comparing the user's DNA with that of thousands of reference individuals, the datasets and algorithms vary by company.
For example, if one company uses a different set of reference populations or a different database, the results may vary. Additionally, each company has its own algorithm for analyzing ancestry, which can lead to discrepancies in the assignment of genetic variants to an ethnicity. This does not mean that any of the companies are wrong; rather, each has a different approach.
Sometimes it also happens that small ancestry percentages assigned to unexpected populations appear in the results. This is due to the standard deviation in our statistical methodology. This deviation can lead to some residual percentages being assigned to populations that are not part of the user's main ancestry. These percentages are not relevant and should not be considered when interpreting the results.
Although the tellmeGen ancestry kit is robust and reliable, we recognize that all tests of this type have limitations, and we are constantly innovating and updating our results to improve accuracy.