Separate Your DNA Into Maternal & Paternal Lines
Discover which traits and ancestries you inherited from each parent. Our phasing service creates two separate files - one for each parental contribution - enabling deeper genealogical insights and clearer family connections.
What is DNA Phasing?
Understanding Phasing
You inherit 50% of your DNA from each parent. Through phasing, we create two separate RAW files, each representing the genetic contribution from one parent. This allows you to determine which traits or ancestries you inherited from your maternal or paternal side.
DNA phasing is particularly valuable for ancestry and genetic genealogy because it allows you to determine the specific ancestry and DNA matches that you inherited from each parent. This separation provides clearer insights into your family history.
Important Note
In Duo or Trio phasing, the phased files contain only the shared SNPs between the child's file and the parents' files. SNPs that are not shared cannot be phased. We strongly recommend using the same testing company for the child and the parents for best results.
Phasing Options
Choose the method that works best for your situation
Phasing Without Parents
Uses population-level haplotype patterns to statistically separate your chromosomes into maternal and paternal contributions.
- Separate maternal/paternal DNA
- No parental samples needed
- Some ancestry noise expected
Child + One Parent
With one parent's DNA, we can definitively assign which chromosomes came from that parent and which from the other.
- Precise parent identification
- 99% separated ancestry
- Parent 1 = provided parent
Child + Both Parents
With both parents' DNA, achieve the highest possible accuracy for complete parental separation.
- Complete parental separation
- Near-complete ancestry accuracy
- Highest precision possible
How It Works
Simple three-step process to separate your parental DNA
What Happens Inside the Pipeline
The statistical phasing pipeline runs on research-grade bioinformatics infrastructure. Here's what actually runs when you submit a file.
Supported DNA Test Providers
Provider names describe file compatibility only; no affiliation or endorsement is implied.
What You'll Receive
Service Includes
- Two phased RAW files (Parent 1, Parent 2)
- Starter Pack for each phased file
- Processing within 48 hours
- Comprehensive parental ancestry insights
Usage Scenarios
- DNAGENICS Analysis - separate reports per parent
- Ancestry Research - distinct maternal/paternal breakdown
- Genealogy - clearer DNA match assignments
- Third-party platforms - GEDmatch, MyTrueAncestry
Service Options
Choose your phasing method
Phasing Without Parents
- Statistical phasing (~90% accuracy)
- Two separate parental files
- Starter Pack included
- Fast processing (~48h)
- Secure handling
- Technical support
Phasing With Parents
- Duo/Trio phasing (up to 99%)
- Two separate parental files
- Starter Pack included
- Fast processing (~48h)
- Secure handling
- Technical support
Frequently Asked Questions
Why do I need to test my parents when I can phase my own DNA?
Each phased file contains only the portion inherited from that parent. Testing a parent directly is still required to obtain genetic information that was not inherited by the child.
What determines Parent 1 versus Parent 2?
In Duo Phasing, Parent 1 is the parent whose raw file is provided. In Trio Phasing, the labels follow file selection order. Without parent files, the two labels are arbitrary.
What about shared SNPs?
Duo and Trio outputs include SNPs available in both the child's and the relevant parent files. Using files with greater marker overlap can improve usable coverage.
Can I rephase a previously phased file?
No. Use the original unphased raw file for a new phasing request because a phased output represents one inferred haplotype.
Things to Know
Technical Details
- Accepts HG19 (GRCh37) and HG38 (GRCh38) input files; build is auto-detected
- Phased output files are delivered in both HG19 and HG38
- Phasing covers chromosomes 1-22 and X
- Process takes up to 48 hours
- Best results when all tests are from the same company
- For ancestry and genealogy purposes only
- Once phased, files cannot be rephased
Legal Information
Intended Use
This service is intended solely for ancestry and genealogy research purposes. It is not designed, intended, or suitable for health-related uses or medical purposes.
Key Terms
- Statistical Nature: Phasing accuracy varies from 90-99% depending on method. Statistical phasing may have some noise in ancestry results.
- No Health Claims: We explicitly disclaim responsibility for health predictions or interpretations made from phased data.
- Third-Party Compatibility: Compatibility with external platforms is provided as-is and not guaranteed.
- Data Privacy: Your files are processed securely and available via private download link.
Start Your DNA Phasing Today
Discover your parental genetic heritage with separated maternal and paternal files
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