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From SNPedia
(Redirected from AncestryDNA)

http://www.ancestry.com/ uses an Illumina OmniExpress Plus, reporting ~700,000 SNP's for $99. The service is available in the USA, UK, Ireland, Australia, New Zealand, and Canada, as well as 29 additional more recently added countries from Europe to Asia. Raw data downloads are available.

As of late May 2016 Ancestry is using a new microarray with higher coverage, Category:On_chip_Ancestry_v2.

Step 3. Click Settings
Step 4. Download
  1. Log into http://ancestry.com
  2. Click on "Your DNA Home Page"
  3. Click on "Settings"
  4. in the Actions Pane which denotes "Download your raw DNA data" click on "Get Started"
  5. Follow their instructions
  6. When the download is complete visit https://promethease.com
  7. Please read and check the boxes if you understand and agree with the statements
  8. Click on "Upload raw data"
  9. Navigate to your Downloads folder and upload the zip file

Raw data for a female often seems to have a small amount of Y chromosomal data reported. This has caused problems where Promethease has been confused. A discussion about this is visible at

For the benefit of anyone looking at Ancestry.com data files, be aware that the designation of chromosomes "23", "24", "25" and "26" in these files indicate the following:

  • If the Ancestry.com data file says a SNP is from chromosome 23, it's actually from the X chromosome.
  • If it indicates chromosome 24, it's from the portion of the Y chromosome that is not part of the pseudoautosomal region.
  • If it indicates chromosome 25, the designated SNP is from the pseudoautosomal region of the Y chromosome.
  • If it indicates chromosome 26, it's mitochondrial data (which is present in at least some Ancestry data produced since May 2016).