DNA and Genetic Genealogy Hub

Genetic genealogy has revolutionized the search for your biological family. While traditional searches relied on sealed records, DNA offers a route directly to your biological relatives. This hub centralizes our expert resources to help you move from a list of names to a meaningful reunion.

Core DNA Resources on Adopted.com

Start your journey by exploring our foundational DNA content:

• DNA Matching Overview: Learn how our platform accepts raw data from all major providers to find matches within our exclusive community.
• How DNA Powers Your Search: A deep dive into the "Biological GPS" and how it bypasses sealed records.
• Adopted.com vs. Genealogy Sites: Understand why a reunion registry is more effective than a standard family tree site for making intentional contact.

Deep Dive: Choosing and Using Your Test

For adoptees, the priority is Database Size and Matching Tools. Here is how the top providers compare based on recent performance data:

Can Genealogy Sites Find Birth Family

Yes, but with a strategy.

1. Widen the Pool: Testing companies like 23andMe and AncestryDNA only show you matches within their own walled gardens. To find family, you must go where they are.
2. Autosomal DNA (atDNA): This is the standard test for finding family. It looks at DNA from both your maternal and paternal lines and is effective for identifying relatives within the last 5–6 generations.
3. Don't Dismiss Distant Matches: Even a match sharing only 3% of your DNA (roughly a 2nd or 3rd cousin) can be the key. By identifying their great-grandparents, you can search down the family tree to find your birth parents.

Advanced Analysis Workflows

To solve an adoption case, genealogists use the biological principles of inheritance. Below are the core methods used to identify biological parents and ancestors.

1. Autosomal DNA Testing and Recombination: Autosomal DNA is inherited from both parents in a random process called recombination. Because segments of DNA are passed down in chunks, the length of shared segments (measured in centimorgans) indicates how closely you are related to a match.
2. Triangulation: This is the process of identifying a group of three or more people who all share a common DNA segment on the same chromosome. If Person A, Person B, and you all share the same segment at the same location, it indicates that all three individuals descended from the same most recent common ancestor (MRCA).
3. Genetic Distance (Centimorgans): A centimorgan (cM) is a unit of recombinant frequency. By calculating the total shared cMs across all segments, researchers can determine the probability of a specific relationship.
   • Direct parent/child matches typically share ,3,400 cM.
   • First cousins share approximately 866 cM.
4. Phasing: This is the process of determining which DNA alleles were inherited from which parent. By comparing your DNA with that of a known relative, you can "phase" your results to determine which remaining matches belong to your unknown biological line.
5. Y-Chromosome (Y-DNA) and Mitochondrial (mtDNA) Testing: Y-DNA is passed strictly from father to son and can be used to identify the direct paternal surname.
   • mtDNA is passed from mother to children and can be used to verify a direct maternal lineage, though it mutates much more slowly than Y-DNA.

Integrating DNA with the Registry

The most common mistake is leaving your DNA results siloed on a single site. Maximize your visibility with these steps:

1. Upload Your Raw Data: Don't pay for multiple tests. Download your data from genealogy sites and upload it to Adopted.com.
2. Cross-Reference Surnames: Use the surnames from your DNA matches in our NameSearch feature.
3. Mutual Intent: Remember, a DNA match on a genealogy site might be cold. A match on Adopted.com means the other person is actively looking for you.

Privacy, Ethics, and Expectations

DNA testing is a powerful tool, but it requires a sensitive approach.

• Privacy First: We prioritize your data security. Review our Privacy Protection Framework to see how we use your data.
• Manage Expectations: DNA provides the link, but people provide the relationship. Not every match will be ready for an immediate reunion.
• Support: If you feel overwhelmed, visit our blogs for advice on the emotional side of discovery.