Articles
57 articles on Guides, ancient-DNA research written up for readers who want the evidence, not just the headline.
Step-by-step guides to the practical half of ancestry analysis: downloading raw data from each testing company, obtaining Global25 coordinates, reading a qpAdm model, running the free tools, and knowing which method answers which question. Every guide states costs and waiting times honestly, including for the steps we have no hand in.
A plain definition of archaeogenetics, the history from Pääbo's first sequences to the 2010 Neanderthal genome, Haak 2015 and the Allen Ancient DNA Resource, the methods (capture, contamination control, f-statistics, qpAdm, IBD), the big findings by continent, how consumer ancient-DNA services build on the field, and a reading list.
Step-by-step instructions, checked against each vendor's own help page on 2026-09-15, for downloading the raw DNA file from 23andMe, AncestryDNA, MyHeritage, FamilyTreeDNA and Living DNA: where the button is, how long the link lasts, what the file is called, what is inside it, and what to run it through next.
The DNA upload sites that take a 23andMe, AncestryDNA, MyHeritage, FamilyTreeDNA or Living DNA raw file in 2026, sorted by what each one returns: relative matching, ancient DNA analysis, admixture calculators, health reports and free tools, with the price and the free tier as each site listed them on 2026-09-15.
A first-person answer to "is Ancestrify legit": the registered trader behind it, what each of the three analyses delivers and costs, where the data lives, how refunds work, what it never claims, and how to verify every statement yourself.
Have Global25 coordinates? Get a free G25 Admix report: admixture per era, closest populations, notable matches. Free once per account, nothing is published.
Every service that sells or offers a Global25 (G25) analysis in 2026, side by side: what each computes, whether the coordinates are official, whether the source panels are published, whether anyone builds a calculator around your own row, and the price model as each site states it, with the complete price ledger of the Global25 ecosystem.
A structured learning path through everything qpAdm: what to read in what order, from the f4-statistics underneath to running models in R, choosing outgroups, reading results and knowing the method's measured limits.
A working qpAdm checklist: history type, pre-study odds, temporal order, right sets, parsimony, acceptance and reporting, each rule with its source and limits.
The Middle East is where qpAdm's sources crowd closest together: Natufian, Anatolian, Iranian and Caucasus ancestries all interrelated. The working recipe, the right set that splits them, failure modes and a worked reading.
South Asia is qpAdm's hardest standard fixture: one ancestral stream has no ancient sample at all. The working recipe — Indus Periphery, steppe MLBA, the Onge-as-AASI-proxy problem — with right sets, failure modes and a worked reading.
The three-source model that rebuilt European prehistory — WHG, Anatolian farmers, steppe pastoralists — as a working qpAdm recipe: exact source and right-set choices, regional adjustments, failure modes and a worked reading.
What .AG, .TW, .SG, .DG and .HO mean on AADR samples, what a label with no suffix is, and how to pick samples so lab methods never pose as ancestry.
The settings tutorials skip and reviewers ask about: extract_f2 versus genotype input, allsnps, maxmiss, fudge and fudge_twice, blgsize, boot, afprod and constrained. What each does, the measured stakes, and the settings that reproduce a classic ADMIXTOOLS result.
The undocumented half of every qpAdm analysis: file formats, genome builds, strand hygiene, convertf and Poseidon, and the merge arithmetic that decides your standard errors before any model runs.
From genotype files to a tested model: f2 extraction, qpadm() and its output tables, the arguments that silently change results (allsnps, fudge_twice, constrained), and the protocol discipline the code will not enforce for you.
ADMIXTURE and admixture calculators describe structure and always return percentages; qpAdm tests an explicit model and can reject it. What each estimates, why papers run both, and when qpAdm is worth paying for.
The fit distance measures how far a mixture still sits from your coordinate — not whether the model is right. Calibrated bands for reading one, why lower stops being better, and the checks that actually validate a model.
Every Global25 row exists in two forms, and mixing them is the hobby's most common silent error. What scaling does mathematically, which form each tool expects, and the tell-tale signs of a mixed comparison.
Global25 is a projection, not a test — so 'accuracy' has layers: the coordinate's own fidelity, the references it is compared against, and the models built on top. An honest audit of all three.
What a Global25 PCA projection shows, what the axes are and are not, why plot distance lies, the difference between projecting onto a fixed view and fitting your own — and the honest uses of both.
A Global25 model and a testing company's ethnicity estimate answer different questions with different references and different time depths. What each is actually computing, and which to trust for which claim.
Everything you can do with a Global25 row without paying anyone: distance rankings, admixture fits, PCA plots, averaging, authenticity checks — Vahaduo, nMonte and the Ancestrify Lab, honestly compared.
What a Global25 distance ranking actually measures, why era choice changes everything, how close is 'close', and the four misreadings that turn a good tool into a wrong conclusion.
Every admixture calculator — GEDmatch's classics, Global25 fits, testing-company estimates — is an optimiser that cannot say no. How the three families work, what the percentages mean, and the questions a calculator can and cannot answer.
Which GEDmatch admixture project to run for your background, what each calculator's components mean, why the projects disagree with each other, and what has aged since 2012–2016.
There is no single best admixture calculator — there is a best one per question. An honest decision guide across GEDmatch's classics, Global25 tools and formal methods, from someone who builds one of them.
Accuracy has three different meanings for an ancestry calculator, and the tools do well on exactly one of them. Where percentages are trustworthy, where they are noise, and how to tell which regime you are in.
Oracle ranks reference populations by how closely their calculator percentages match yours — not by shared DNA. How the distance is computed, what single and mixed modes tell you, and the misreadings to avoid.
The thirteen K13 components, what North Atlantic, East Med and West Asian are anchored to, who the calculator works best for, how to read the Oracle — and the caveats that come with a 2012-era tool.
What the 36-component Eurogenes calculator can genuinely show, why its regional labels invite over-reading, what a K36 heat map is actually plotting, and when a distance ranking answers the question better.
The original admixture project's most-used calculator: what the twelve K12b components are anchored to, what Gedrosia and Caucasus mean in modern ancient-DNA terms, and how to read a K12b breakdown.
What HarappaWorld's S-Indian, Baloch and NE-Euro components are anchored to, why it remains the reference calculator for South Asian ancestry, and how its 2012 categories map onto what ancient DNA later proved.
A calculator against modern populations answers 'who do I resemble today'; one against dated ancient samples answers 'which deep ancestries formed me'. Mixing up the two produces the classic misreadings.
A step-by-step qpAdm tutorial: check your raw file, merge it into AADR v66, choose sources and outgroups, run it in the browser or in R, and read the result.
Every place that sells or offers qpAdm in 2026, done-for-you analyses and DIY tools side by side, and what an analysis costs: four one-time tiers from 29.99 EUR, the add-ons, and when a subscription is cheaper.
What Davidski's Eurogenes G25 Requests portal is, what you upload, the scaled and unscaled rows you get back, their stated fee, and what to do with the row next.
How to choose qpAdm sources and right populations: the O9 outgroup set and its extensions, how many to use, the drift rule, the rank test, temporal logic, proxy labels, rotation and a worked example.
What a qpAdm p-value below 0.05 does and does not mean, the five usual causes of a rejection, negative weights and low Z-scores, the errors and odd outputs decoded (SE 9.994, every model passing, p = 0 or NA, infeasible nested models, forced weights), what to try next and when to stop.
How to download your 23andMe, AncestryDNA or MyHeritage raw data, how each file is laid out, what its chip means for coverage after the AADR merge, and what a qpAdm order does with it.
What ancient genomes say about Jewish ancestry, why a consumer 'Ashkenazi Jewish' percentage is circular and cannot fail, what a qpAdm model with a p-value measures instead, its limits for a Jewish genome, and a checklist before you buy.
What every number in the model record of an Ancestrify qpAdm report means, from chi-square, degrees of freedom and f4 rank to 95% confidence intervals, what the analyst checked before publishing, and a worked example read line by line, with the R code to rerun it.
A plain reading guide to the three numbers in every qpAdm result — what the p-value tests, what a standard error bounds, what a Z-score rules out — with worked examples and the mistakes that make a passing model wrong.
Global25 coordinates explained from scratch: what the 25 numbers are, where they come from, scaled versus unscaled, what you can compute from them, and the honest limits of a coordinate-based ancestry analysis.
A step-by-step Vahaduo tutorial: where to paste your Global25 coordinates, how the Distance, Single, Multi and PCA tabs work, how to build a source panel, and how to read a fit distance without over-reading it.
What a 23andMe or AncestryDNA ethnicity estimate measures, what an ancient-DNA ancestry test measures instead, why the two disagree by design, and how to run the second one on the raw file you already have.
Who the Western Steppe Herders were, how steppe ancestry spread across Europe and Asia after 3000 BC, what a 'steppe percentage' actually measures, and how to estimate yours with qpAdm or Global25 from a raw DNA file.
Who Europe's Mesolithic hunter-gatherers were — Western, Eastern and Caucasus — how their ancestry survived farming and the steppe migrations, and how to measure your hunter-gatherer share from a raw DNA file.
The first farmers of Anatolia spread across Europe from 6500 BC and are the largest ancestry component in most southern Europeans today. Who they were, what 'Early European Farmer' means in a calculator, typical shares by region, and how to measure yours from a raw DNA file.
How to run an ancient-DNA ancestry analysis from a whole-genome sequencing VCF — tellmeGen, Dante Labs, Nebula and similar — what happens to the file at upload, why it is converted to the panel's markers, and what changes versus a chip export.
What a maternal (mtDNA) haplogroup is, how the tree is built, what H, U5, K, T2 and the other common branches tell you, why most chip kits resolve to a broad branch, and what a haplogroup can and cannot say about ancestry.
How to run qpAdm on your own genome in the Ancestry Workbench: preparing a kit, choosing sources and outgroups, reading a rejection, running a rotation as a batch of real fits, scanning Fst distance, and downloading the EIGENSTRAT bundle to reproduce everything on your own machine.
Why a standard Global25 calculator can describe a population well and one person badly, how our analyst builds a calculator around your own coordinates for every Ancestry Map, and what your report shows you.
What the Allen Ancient DNA Resource is, who curates it, what a version like v66 contains, the difference between the 1240K and Human Origins panels, and how the dataset becomes the reference behind an ancient-DNA ancestry analysis.
What it means to share a stretch of DNA with a person who died thousands of years ago, why such matches are identity by state rather than identity by descent, what the centimorgan figures mean, and why a shared segment is never proof of descent.
What a Y-DNA haplogroup actually is, how to export the raw file from 23andMe, AncestryDNA or MyHeritage, how to get a free and honest paternal haplogroup call from it, and where to explore your branch afterwards.
What mitochondrial DNA records, how to get a free maternal haplogroup call from a 23andMe, AncestryDNA or MyHeritage export, why most chip kits resolve to a broad branch, and how to explore the maternal tree afterwards.
Where Global25 coordinates come from, how to get them whether you tested with 23andMe, AncestryDNA, MyHeritage, FamilyTreeDNA, LivingDNA or a whole-genome sequencer, what every route costs, and how to tell a real coordinate row from a simulated one.