Am I able to download my raw data?

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Family Tree DNA does not have a file format for Y-Chromosome DNA SNP (single nucleotide polymorphism) results. [...]

Do SNPs ever “mutate back?”

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Yes. It is possible that a SNP will back mutate (change back). However, SNPs [...]

Are Y-DNA haplogroups the same as mtDNA haplogroups?

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No, the haplogroup names in mitochondrial DNA (mtDNA) do not correspond with the same [...]

How often does Family Tree DNA update their tree?

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Family Tree DNA updates the phylogenetic tree on the Y-DNA – Haplotree & SNPs page [...]

How are haplogroups and their subclades named?

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Y-Chromosome DNA (Y-DNA) haplogroups and subclades names follow the conventions of the Y-Chromosome Consortium’s (YCC). The [...]

How does Y-Chromosome DNA (Y-DNA) haplogroup prediction work?

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At Family Tree DNA, a Y-DNA haplogroup prediction is calculated using genetic distance. The [...]

How do I know which Advanced Order SNPs make sense for me to order?

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Please order Advanced SNPs with the help of an expert. Before ordering, you should [...]

What is the geographic and historic origin of my Y-Chromosome DNA (Y-DNA) haplogroup?

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The following descriptions provide brief overviews of each haplogroup’s origin and geographic distribution.
Haplogroup [...]

How many generations do the Y-Chromosome DNA (Y-DNA) SNP tests trace?

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The Y-DNA tree begins with the common paternal ancestor to all men alive today. [...]

Can I skip extensive SNP testing and just test for a downstream Advanced Order SNP? If I am positive, may I assume that I also have all the SNPs above it?

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It is possible to order Advanced SNPs in this way. We advise that you [...]

Do I have to order a Y-Chromosome DNA (Y-DNA) STR test before I take a SNP test?

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No, you may first take the Geno 2.0 test and then transfer your results [...]

Are Y-Chromosome DNA (Y-DNA) SNPs ever related to recent times and genealogy? Are they always for historic periods and more ancient ancestry?

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No. Y-Chromosome DNA SNPs (single nucleotide polymorphisms) are not always from anthropological or even [...]

Why has my Y-Chromosome haplogroup changed?

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The Y-Chromosome Consortium’s (YCC) has published a new version or update of their tree. [...]

How often does the Y-Chromosome Consortium update their tree?

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The Y-Chromosome Consortium (YCC) updates their tree several times a year. There is usually [...]

How often do Y-Chromosome DNA (Y-DNA) SNPs occur?

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Across the entire Y-Chromosome DNA, a SNP occurs every one to two generations.

In the Xue 2010 paper, [...]

Can the same SNP appear in more than one haplogroup?

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Yes, the same SNP may appear in more than one haplogroup. This is because [...]

Why does Family Tree DNA’s Haplotree differ from other Y-DNA Trees?

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There are differences between the phylogenetic trees because there are differences in standards. Family [...]

What are Advanced Order SNPs?

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The Advanced Order SNPs are SNPs (single nucleotide polymorphisms) from recent scientific research and other discoveries. They [...]

Who is the best person to test for a Y-Chromosome DNA (Y-DNA) SNP test?

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If you are deciding between men from the same paternal lineage who are related [...]

When comparing genetic distance between people, which is more important to look at SNPs or STRs?

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SNPs (single nucleotide polymorphisms) offer a definitive answer to a potential relationship. When one [...]

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