How to Read and Analyze AncestryDNA Raw DNA Data
Updated: Oct 1
You have your AncestryDNA raw data. Now what? This file holds a treasure trove of genetic information. But it looks like a confusing spreadsheet full of letters and numbers. Let’s dive in.
What is AncestryDNA raw data?
Your raw DNA data is a text file. It contains your parts of your genetic code in a simple format. Each line shows a specific location on your DNA strand. It lists the chromosome number, position, and the genetic variants you carry. These variants are called SNPs (single nucleotide polymorphisms) [R].
How it looks:
Chromosome: The DNA is divided into 23 pairs of chromosomes.
Position: The exact spot on the chromosome.
Genotype: The two letters representing your genetic variants at that spot.
The downloaded file can help you:
look up individual SNPs;
identify your recorded genotype at tested positions;
use compatible tools to explore selected health, trait, nutrition, gene-function, and pharmacogenetic associations;
retain a personal copy of the genotype data generated from your test.
The file only contains the locations tested by AncestryDNA. It does not contain every genetic variant you carry.
How to download your AncestryDNA raw data
Ancestry’s current instructions direct the manager of a DNA test to:
Sign in and open the relevant DNA test settings.
Go to Download or delete.
Select Download DNA Data.
Follow the verification instructions provided by Ancestry and save the downloaded file securely.
Only the manager of a DNA test can download its DNA data. Ancestry also warns that once the file has been downloaded, that copy is no longer protected by Ancestry’s security measures [R]. Interface wording can change, so consult Ancestry’s current download instructions if the options in your account look different.
Store the downloaded file as sensitive personal information. Avoid emailing it unnecessarily or placing it in an unsecured shared folder.
How to Analyze your AncestryDNA Raw Data File
Start by uploading your raw data to a trusted analysis platform. These platforms decode your genetic variants and translate them into meaningful insights. They compare your data to scientific research to reveal health risks, traits, and ancestry.
Here’s a simple step-by-step:
Download your raw data from AncestryDNA’s website.
Choose a reliable analysis service. Look for one that offers health and wellness reports.
Upload your raw data file securely.
Review your personalized reports. Focus on actionable insights.
Take notes on any health risks or traits that stand out.
Remember, not all platforms are equal. Some provide detailed, science-backed reports. Others offer vague or generic information. Choose wisely.
What might AncestryDNA raw-data analysis show?
Depending on which markers are present in the file and supported by the analysis platform, raw-data interpretation may explore:
selected genetic associations with common health risks;
selected carrier-status or other high-impact variants directly tested in the file;
functional variants associated with differences in enzyme, transporter, receptor, or regulatory activity;
nutrition and metabolism-related tendencies;
selected pharmacogenetic markers;
physical, sensory, behavioral, and wellness-related traits;
individual genes and SNPs.
These categories do not all represent the same type or strength of evidence. A functional enzyme variant, a statistical disease-risk association, and an exploratory trait association should not be interpreted in the same way.
Privacy considerations before analyzing your file
Raw DNA data is sensitive because it is personal, largely permanent, and partly shared with biological relatives. Once downloaded, it is your responsibility to decide where the file is stored and which services can access it. MedlinePlus likewise notes that downloaded raw data is no longer protected by the original testing service’s privacy measures [R].
Before selecting an analysis platform, determine:
whether your file leaves your device;
whether it is retained after analysis;
whether results are linked to your identity;
whether data may be shared, sold, or used for research;
whether you can delete stored information;
what happens if the company changes ownership.
GenesUnveiled’s normal analysis workflow is designed to avoid permanent DNA-file storage by processing the selected file inside the browser. Learn more about DNA privacy and client-side analysis.
Explore your AncestryDNA file
Your raw DNA file can provide a useful starting point for learning about selected genetic variants, but its value depends on careful interpretation and clear limitations.
Free account required · Analysis runs locally in your browser
Comments