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Similarly, mitochondrial DNA, or mtDNA, is used by direct-to-consumer DNA tests to trace your direct maternal lineage and determine maternal haplogroups. While most DNA lives in your cells' nuclei, mtDNA lives in the mitochondria. Mitochondria are the cells' powerhouses – their 37 genes are necessary for cellular energy production and respiration. Previous research suggested that mtDNA is inherited directly from your mother, but a recent study found that biparental mtDNA may be more common. This discovery may affect maternal haplogroup testing in DNA tests in the future, but for now, it’s safe to assume your results are correct.
There is a TV show called Long Lost Family on TLC that uses Ancestry DNA and records to identify and locate families. I am not an adoptee but have taken tests with Ancestry and Family Tree DNA. I think using the Ancestry test would be better to help identify your birth parents since you could view your close matches and their family trees (if public). You can also download the raw data from Ancestry, FamilyTree, or 23&Me and upload them to gedmatch. Gedmatch is a free site where test-takers from different companies can compare results/matches without having to test with all three companies.
Hello…so I am interested in purchasing a few test for myself, my sister and my brother for Christmas. Primary interest is just seeing what our true roots are. Growing up we have been told we are Native American (Nipmuc tribe) and african american with some roots in Jamaica but I would love to see how accurate that all is. Not really looking to get “connected” to any long lost relatives but it would be great to know where in the world we “originate” from when looking into our ancestry. Which test would be the best for these results? Thank you… Read more »
Our testers took multiple DNA ancestry tests, and the services returned slightly different results for each person. This doesn’t necessarily mean that any one company is more accurate than another. Every DNA testing service uses its own algorithm and data set – different reference populations drawn from different databases. Nacho Esteban of 24Genetics told us, “Ancestry is not an exact science. The top five companies in the world would show very similar results when talking about continents; the similarity is smaller when talking about countries. In regional ancestry, some border regions are difficult to identify and sometimes there may be discrepancies. So we cannot take the information as something 100% sure. But at the end, it gives a great picture of where our ancestors were from.”
Hi Dianne, First thing first, thanks for your comment. “he only test that can give information about recent relatives ( 5 generations back only) is the autosomal test” – autosomal test is indeed a DNA test that gives you the info regarding your relatives, both from the paternal and maternal lineage. We clearly specified it in the article. Ancestry.com, our best-rated provider, offer this test in their Ancestry DNA test. Regarding the accuracy of the time frame you specified, there is indeed a diminishing marginal utility of accuracy as you go back deeper into the past (generation wise). According to one of our most trusted sources (University College of London), the accuracy is 10 generations back and not 5 as you specified (Please provide a source to your number, so we would be able to check it and revise if needed). 10 generation back is a quite long time span – 300 years (more or less). “The tests that say we are such-and-such % of this or that ethnicity isn’t very accurate because keep in mind, the wars and the spoils of wars that humans have been engaged in forever, mean we all have a mixture of genetic material from around the world” – Indeed, most of our ancestors were mixed due to historical events (wars, migration and etc.), but I don’t find how your statement is connected to the fact that this test is not accurate. DNA test is objective and gives you the naked facts. To conclude,
As a postscript, I eventually end up having an interesting chat with Titanovo about my “bioinformatics” (distilled from my 23andMe data). One of the first things I’m told is that my eyes are green (they’re brown). However, the bioinformatics got my skin type and frame/weight generally right and had interesting (albeit occasionally generic) things to say about exercise, diet, goals, steering clear of too much sugar and so on.
Direct-to-consumer DNA tests are still relatively new. The first ancestral DNA test launched in 2001 by FamilyTreeDNA, but companies didn’t start genotyping autosomal DNA until 2007. Still, tests and results have come a long way since then, with much lower prices and streamlined sample collection, registration and results. If you’re still on the fence about whether or not to buy a DNA ancestry test for yourself or as a gift, here are a few things to consider.
In testing, we found that many tests have much more specific and detailed results for European ancestry than anywhere else. This is due more to the diversity of the database than size. For example, AncestryDNA has the largest database with over 10 million samples yet results for Asian ancestry are markedly less specific than results from several companies with much smaller databases, including 23andMe and Living DNA. Instead of pulling reference samples directly from the existing database, however, many companies seek out high quality data with special research projects. 23andMe, for example, offers its Global Genetics project, which sends free kits to people with all four grandparents born in certain countries that are underrepresented in the database.
In McCartney’s view, enough testing is already done in this country (sometimes too much) and there are issues of regulation and “informed consent”. “People are given very dramatic reasons to have these tests – it could help save your life, it could help improve the quality of your life – but where is the actual controlled evidence that these tests have ever done that? There’s no evidence that says doing these tests makes people become healthier.”