![only 30% of my dna matches my father only 30% of my dna matches my father](https://whoareyoumadeof.com/wp-content/uploads/2018/02/Can-Ancestry-DNA-Tell-Me-Who-My-Father-Is_.png)
These ancestors are the only individuals in your Genetic Tree. However, only a tiny subset of these individuals actually (randomly) contributed DNA to the genome that you walk around with today. Remember that “ Everyone Has Two Family Trees – A Genealogical Tree and a Genetic Tree.” Your Genealogical Tree is the tree containing ALL of your ancestors. I’m not surprised by this, but I do expect that over time – as the industry arrives at more standard reference populations and algorithms (which the cheap whole-genome sequencing revolution will enable) – that estimates from different companies will align much more closely.
![only 30% of my dna matches my father only 30% of my dna matches my father](https://www.ibdna.com/assets/PaternityDuoInclusion.jpg)
Different Reference Populations and AlgorithmsĪs I suggested above, different companies use different reference populations and algorithms to create a biogeographical estimate, which can result in varying estimates.įor example, in my previous review of AncestryDNA’s Genetic Ethnicity Prediction, I compared my genetic ethnicity results from three companies (, 23andMe, and FTDNA), and found that their results varied considerably.Here are just a few factors that can influence a biogeographical estimate, and any one or more of these may be the reason that your Genetic Ethnicity Prediction does not match estimates you make based on your paper trail. Ten different researchers analyzing the same genome can come up with ten different estimates based on a number of different factors, including their algorithm, the reference populations used for comparison, and many others. It’s important to understand that biogeographical estimates, which are still relatively new, are notoriously difficult and complicated. As scientists gain a deeper understanding of the data, our prediction models will evolve to provide you with more accurate and relevant information about your family history. Right now, your genetic ethnicity may not look quite right, with some ethnicities under or over-represented. It’s an emerging field with exciting new discoveries and developments constantly changing the landscape. We use cutting-edge science as a base for our predictions, but that comes with its own inherent challenges. Indeed, is well aware of the limitations and challenges that their Genetic Ethnicity Prediction brings: ’s DNA arm has a solid scientific team and a large and valuable reference database. “Just received my results: 21% Southern European and 79% Central European which doesn’t follow years of work on my family history.”ĭo these comments reflect errors in AncestryDNA’s Genetic Ethnicity Prediction, or are there other factors at play?Īlthough I am not privy to the ‘behind-the-scenes’ at, I don’t believe that there are serious issues with AncestryDNA’s Genetic Ethnicity Prediction. It states that I have 60% Central Europe, 30% Scandinavian and 7% Southern Europe. According to the results I have no British Isles DNA. I was born in England and I have gone back many generations and have found that all my ancestors as far back as the 1600′s in most cases are English. “I just got my DNA test results back from and I am concerned. Specifically, several test-takers believe that the Genetic Ethnicity Prediction provided by does not reflect the numbers that they expected based on their own research. I’ve received a number of emails and comments (see, e.g., here) complaining about ’s new test, AncestryDNA.