What does the Whole Genome Sequencing (WGS) upgrade mean for my DNA results?

MyHeritage DNA has upgraded to Whole Genome Sequencing (WGS), which reads nearly all of an individual's DNA for improved accuracy in DNA Matches and ethnicity estimates. Previously processed kits or uploaded DNA data will not be reprocessed with WGS, and individuals must order a new kit to access this technology. While the sample collection kit remains the same, the processing method in the lab has changed. Significant improvements from WGS will become noticeable over time, as MyHeritage builds a larger database of WGS-processed kits.

What is Whole Genome Sequencing (WGS) that MyHeritage now uses for its DNA tests?

MyHeritage has upgraded its DNA testing to Whole Genome Sequencing (WGS), a comprehensive technology that reads nearly all three billion base pairs of the human genome. This advancement provides richer genetic information for more accurate DNA Matches and improved Ethnicity Estimates. By using a low-pass sequencing approach with 2x coverage and advanced statistical methods, MyHeritage delivers highly accurate genealogical results affordably. This transition makes MyHeritage the first major consumer DNA testing company to adopt WGS at scale, with all new kits expected to be processed this way by the end of 2025.

How do I review a DNA Match?

To review a DNA Match, users can access an in-depth page presenting detailed information. This page includes contact options for the match, an estimated relationship, and sections such as Smart Matches, shared ancestral surnames, and shared DNA Matches, which indicate genetic relatives common to both individuals. Pedigree charts display up to five generations of direct ancestors, and the Chromosome Browser visually represents shared DNA segments, helping to identify common ancestors.

How do I use the Chromosome Browser — One-to-many?

The Chromosome Browser — One-to-many enables the comparison of DNA segments between a user (or individuals whose DNA kits are managed by the user) and up to seven DNA Matches. By analyzing these shared segments, including triangulated segments, users can infer relationships and identify common ancestors. This tool is accessed through the DNA Tools section of MyHeritage and allows for detailed visual comparison of genetic overlap across chromosomes.

What are the privacy options for my DNA data?

Users control their DNA privacy settings through the DNA Preferences section of their family site. These settings include enabling or disabling DNA matching, allowing others to view ethnicity estimates, and granting permission for DNA matches to view and download shared DNA segment data. Additionally, users can choose whether to display DNA badges in family trees and can opt into or out of the DNA Informed Consent Agreement, which allows MyHeritage to use anonymized DNA data for research. These options empower users to manage how their genetic information is shared and utilized on the platform.

Whole Genome Sequencing for Genealogy Is Here, But Is It Worth It?

Every family historian dreams of finding a definitive record that tells the complete story, a single source to resolve all ancestral mysteries. This pursuit has already led many to genetic testing, which reshaped our understanding of heritage by analyzing small, scattered portions of our DNA. The arrival of whole genome sequencing for genealogy goes a monumental step further, promising access to the entire, unabridged book of our genetic past. Whether this firehose of information helps build a family tree or simply creates a more complex puzzle remains the essential question for dedicated researchers.

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Key Takeaways

WGS vs. Standard Tests: Whole Genome Sequencing maps out nearly all of your 3 billion DNA base pairs, while standard consumer DNA tests use genotyping to look at several hundred thousand specific locations (SNPs).
Cost and Complexity: WGS is significantly more expensive than standard tests and generates a massive, complex data file that requires technical skill to analyze for genealogical purposes.
Limited Immediate Genealogy Use: For the core task of finding and collaborating with DNA matches, the large databases connected to standard autosomal tests are far more effective. W.G.S. data is not directly compatible with these systems.
A Future-Proof Investment: The primary benefit of WGS is possessing a complete digital copy of your genome. This data can be re-analyzed for decades to come as new insights into health and deep ancestry, but its current benefit for the average genealogy hobbyist is limited.

What Exactly is Whole Genome Sequencing?

Whole Genome Sequencing is a laboratory process that determines the nearly complete DNA sequence of an organism's genome at a single time. Think of your DNA as a massive library of books containing the complete instructions for you. A standard autosomal DNA test, the kind most genealogists are familiar with, is like quickly flipping through the library and noting a few thousand key words on specific pages. These tests use a method called genotyping, which focuses on single-nucleotide polymorphisms, or SNPs. These are specific points in the genome where human DNA is known to vary, providing an efficient way to compare individuals and identify relatives.

By contrast, WGS attempts to read every single book, cover to cover, capturing the full text of your genetic story. This is a monumental leap in data, as WGS aims to capture information on all of your billions of base pairs, which are the fundamental building blocks of your DNA. While genotyping is a highly effective shortcut for finding relatives, sequencing provides the entire underlying code from which those shortcuts are drawn. As technology has advanced, what was once a massive public undertaking has become a commercially available service with a far more accessible price point.

This process ultimately provides you with a massive digital file, often hundreds of gigabytes in size, containing the raw data of your unique genetic code. This file is a permanent digital asset representing the most comprehensive look at your DNA possible today. Having this complete record means that you possess the full set of instructions that make you who you are, ready for future analysis.

A genealogist analyzes complex DNA data on a computer screen.

The Allure of a Complete Genetic Blueprint

For a family historian, the idea of having a complete and permanent genetic record is incredibly appealing. This desire moves beyond finding cousin matches and into the realm of creating a lasting family artifact. Why settle for a summary when you can have the entire encyclopedia?

Future-Proofing Your Research

Your DNA doesn’t change, but our scientific understanding of it does, and rapidly. By sequencing your entire genome, you capture a complete snapshot of your genetic inheritance. Imagine a scenario ten years from now where scientists discover a new set of genetic markers that conclusively differentiate between families from two neighboring valleys. If you have only a standard SNP test, you’d need to test again to see if you have those markers.

If you have your full genome sequenced, you could simply have your existing data re-analyzed, making your initial investment continually more valuable over time. You’re not just buying a test; you’re creating a personal genetic archive.

Deeper Ancestral Insights

Whole genome data can offer unparalleled detail for exploring deep ancestry. This is particularly true for Y-DNA, which traces the direct paternal line, and mitochondrial DNA, which traces the direct maternal line. While many standard tests provide basic haplogroup assignments, WGS can offer a far more granular and detailed view of these ancient lineages. A more specific haplogroup placement can narrow down the geographic origins of an ancestral line with greater precision, potentially connecting it to a much smaller region or population group.

Beyond genealogy, many WGS services offer extensive health reporting. Though this is a secondary concern for most family historians, discovering genetic predispositions can sometimes provide clues about medical conditions that have run through a family for generations. This intersection of medical history and family history can add another rich layer to the story of your ancestors. For some, finding a definitive genetic answer to a long-running family health mystery can provide significant personal insight.

The Reality Check: Is WGS Practical for Genealogy Today?

Despite its comprehensive nature, the practical application of Whole Genome Sequencing for everyday genealogical research faces significant hurdles. The reality is that for most people, WGS is a powerful solution to a problem they do not yet have. Understanding the current limitations is key to making an informed decision about which type of test is right for you.

The Cost and Complexity Barriers

First, there is the cost. While prices have fallen dramatically, WGS still costs significantly more than a standard DNA test. This requires a careful consideration of value, asking whether the potential for future discoveries justifies the higher price today. For many, a standard test already provides a wealth of family connections and ancestral insights for a much smaller investment.

Second, and more importantly for genealogists, is the complexity of the data itself. WGS provides a massive, raw data file that is not immediately useful for a non-specialist. It does not come with a user-friendly dashboard of cousin matches or dynamic ethnicity estimate maps that are the hallmarks of standard testing services. To make genealogical sense of this data, you often need to use specialized third-party software and possess a degree of technical comfort with data analysis that goes beyond typical family history research.

Furthermore, your WGS data is not directly compatible with the large, established databases used for relative matching. These platforms were built to process and compare the specific SNP data from standard tests. The value of these databases comes from the "network effect," where millions of users can be compared against one another. Because whole genome data is structured differently, you cannot simply upload your file and see a list of cousins, which is the primary goal for many who take a DNA test.

An expansive family tree glowing on a digital tablet, showing connections between generations.

When Does WGS Make Sense for a Genealogist?

Despite the current limitations for mainstream hobbyists, there are specific scenarios where investing in Whole Genome Sequencing is a logical and valuable step. Identifying these situations can help a researcher decide if the time is right to make the leap.

For the Advanced Genetic Genealogist

If you are a serious "power user" of genetic genealogy, WGS might be for you. This applies to researchers who have already exhausted the potential of autosomal DNA testing, have built extensive family trees, and are now trying to break down stubborn brick walls. For these dedicated individuals, the high-resolution data from WGS is a new frontier of evidence to explore. This detailed information might reveal subtle genetic connections that are invisible in standard tests, providing fresh clues for very old mysteries.

To Preserve a Legacy

Perhaps the most compelling reason for a genealogist to consider WGS is not for their own DNA, but for that of an elderly relative. The DNA of the oldest generation in your family is a priceless and non-renewable resource. They carry unique segments of DNA from ancestors that were not passed down to you or other descendants. Capturing their complete genome via WGS effectively freezes this invaluable genetic information in time. Once that person is gone, that specific combination of ancestral DNA is lost forever.

Getting the Most from Today’s Powerful Genealogy Tools

For most family historians, the path to discovery is not paved with gigabytes of raw genomic data but with the skillful integration of existing, powerful resources. Before considering the significant leap to WGS, it’s worth ensuring you have extracted every bit of value from the tools already at your fingertips. These established methods remain the most direct way to grow a family tree.

Combining DNA with Documentation

A standard autosomal DNA test is the essential starting point for modern family history. For instance, your test results might identify a second cousin you’ve never met. By examining your shared matches and using family tree features, you might hypothesize that you share a set of great-grandparents. You can then turn to the vast collections of online historical records to test this theory and find the documents that prove your connection. This synergy between DNA clues and documentary evidence is the core of modern genealogy, turning genetic pointers into confirmed ancestors.

Leveraging Advanced Platform Features

Advanced features on genealogy platforms also offer deeper insights without the complexity of WGS. Tools that automatically cluster your DNA Matches into groups that likely descend from common ancestors can be revolutionary for organizing your research. These features help you visualize how different sets of cousins are related, pointing you toward specific branches of your family tree. Exploring these tools within a robust database of historical records is the most effective strategy for most researchers today.

Ultimately, Whole Genome Sequencing represents an exciting future for genetic discovery. One day, it may become the standard, with user-friendly tools and massive, compatible databases. For now, however, family historians will find that the most effective and rewarding path to uncovering their roots lies in the powerful combination of affordable DNA testing, vast matching databases, and rich, accessible historical records. The story of your family is waiting to be discovered, and you likely already have the best tools to start telling it.