Knowing your haplogroup is one thing. Seeing where it sits — what branches above it, what descends from it, which mutations define it and where its lineages turn up in the world — is another, and until now it meant piecing it together across half a dozen sites.
Two new free tools in the Ancestrify Lab put the whole picture in one place: the Y-DNA haplotree and the mtDNA haplotree. Both run in your browser, and neither needs an account.
What is in them#
The paternal tree holds over 109,000 named branches, from the root down to twigs defined by mutations only a few centuries old. The maternal tree holds every named branch of the mitochondrial phylogeny.
For any branch you land on, you get:
- The defining variants — the specific SNPs (or mitochondrial mutations) that put a lineage on that branch, with their positions and ancestral/derived states.
- Tester counts — how many tested lineages sit on the branch, and how they distribute across countries.
- The surrounding structure — the branch's parent chain and the named sub-branches beneath it, so you can walk up toward the root or down into the detail.
You can jump straight to a haplogroup by name, search by SNP name, or filter the whole tree by country to see which lineages are common where.
Every section has its own page#
The trees are big enough that a single URL would be a poor way to reference them, so each root section has a page of its own: Y haplogroup R — the largest section, home to both R1b and R1a — through to Y haplogroup T, and every letter of the maternal tree from A to Z.
The branches people search for most have dedicated guide pages with their origin, age and distribution written out in full:
Paternal — R-M269 (R1b, Western Europe's dominant paternal line), R-M417 (R1a), I-M253 (I1, the Nordic lineage), I-P37 (I2a, the Balkan expansion), E-V13, J-M172 (J2), G-M201 (the first farmers' lineage) and more.
Maternal — H and H1, U5 (Europe's hunter-gatherer maternal line), K, J, T2, V, X and W.
Where your haplogroup runs strongest#
Both free finders — the Y-DNA Clade Finder and the mtDNA Haplogroup Finder — now show a prevalence view alongside your result: the countries where tested lineages on your branch are most concentrated, measured as a share of that country's testers rather than as a raw count.
The distinction matters. Raw counts would crown the United States and the United Kingdom for almost every lineage, simply because that is where most testing happens. Prevalence asks a better question: of the people tested in this country, what fraction sit on this branch?
Read it as the geography of testers, not of ancestors. Testing rates differ enormously between countries, and a lineage's modern spread reflects thousands of years of movement since it formed.
Don't know your haplogroup yet?#
Both finders read it from a raw DNA export you already have, for free:
- Y-DNA Clade Finder — your paternal haplogroup. See the full walkthrough.
- mtDNA Haplogroup Finder — your maternal haplogroup, which everyone carries. See the maternal walkthrough.
One thing a haplogroup is not#
Worth repeating, because the trees make it easy to forget: a haplogroup traces one line of descent. Your paternal haplogroup follows your father's father's father's line; your maternal one follows your mother's mother's mother's. Go back ten generations and you have up to 1,024 ancestors — each of these threads follows exactly one of them.
It is a deep-time lineage marker, not an ethnicity and not an ancestry percentage. For a whole-genome answer to "where does my ancestry come from", that is qpAdm or Global25 — different methods answering a different question.
Frequently asked questions#
Do I need an account to browse the trees?#
No. Both haplotree browsers are free and open to everyone, with no registration. The two finders that read your own raw file need a free, email-verified account, because that computation runs on our servers.
How current is the tree data?#
The trees are re-ingested as complete new revisions and swapped in atomically, so what you browse is always one consistent published version rather than a half-updated mixture.
What do the tester counts mean?#
They count tested lineages placed on that branch or any of its sub-branches and reporting an origin — the same cumulative figure the public registry shows for a branch. Each branch also carries its "this branch only" count, the testers whose lineage ends exactly there. Both describe the tested world — heavily weighted toward countries where DNA testing is popular — not ancient population frequencies.
Can I link to a specific branch?#
Yes. Each root section has its own URL, and the most-searched branches have their own guide pages. Within the browser, selecting a branch updates the address so you can share exactly what you are looking at.
