THE GENETIC GENEALOGY SERIES · PART SIX

Starting DNA Genealogy: From Your First Test to Your First Discovery

A thoughtful, practical guide to choosing a DNA test, collecting your sample, protecting your genetic privacy and turning your first matches into meaningful family history.

A practical field guide for the modern family historian

You have explored the science of autosomal chromosomes, traced ancient maternal lineages through mitochondrial DNA, investigated direct paternal ancestry through Y-DNA and learned how these different testing methods can work together. Now comes the most rewarding stage: putting that knowledge into practice.

Beginning genetic genealogy involves more than ordering a test and waiting for an ethnicity estimate. It means choosing the right testing strategy, collecting a usable biological sample, understanding the limits of DNA matching and building a research process that connects genetic evidence with historical records.

This guide is the practical conclusion of our Getting Started with DNA Testing for Genealogy series. Whether you are searching for an unknown ancestor, investigating a family surname, tracing Scandinavian roots or simply trying to understand your family's past, the goal is the same: to begin with a clear plan and make every result count.

01 — Choose the Right DNA Test for Your Research

Your first decision should be guided by your research question, not by the most appealing advertisement. Different tests answer different biological questions, and no single company has every relevant relative in its database.

Autosomal DNA: the best general starting point

Autosomal DNA testing examines genetic material inherited from both parents. Because it can identify relatives across multiple branches of your family tree, it is usually the most versatile first test for general genealogical research.

It is particularly useful for identifying cousins, investigating unknown parentage, testing competing family-tree hypotheses and finding connections to descendants of ancestral siblings.

Comparing the major testing platforms

For a deeper understanding of the underlying science, continue with our guides to autosomal DNA (Part 2), mitochondrial DNA (Part 3) and Y-DNA (Part 4).

02 — Collect Your DNA Sample Correctly

A reliable result begins with a properly collected sample. Most consumer kits use either saliva collected in a tube or cells obtained from the inside of the cheek. The laboratory extracts DNA from cells in that material; saliva itself is not the genetic information being analyzed.

1. Read the kit instructions first. Some providers specify a waiting period before collection. A common instruction is to avoid eating, drinking, smoking, chewing gum and brushing your teeth for at least 30 minutes, but the kit's own requirements take precedence.
2. Prepare your sample carefully. For saliva kits, collect the required amount without introducing unnecessary bubbles. For cheek swabs, rub the inside of each cheek for the full specified time.
3. Use the supplied container and preservative. Do not substitute household containers or add liquids unless explicitly instructed. Seal the sample exactly as directed.
4. Register your kit online. Enter the unique activation code and associate the test with the correct account before mailing it, where required by the provider.
5. Keep a private record. Store the kit number, registration date and shipping details securely. Avoid placing your activation code or other identifying information in public research notes.

03 — Expand Your Matching Opportunities

Genetic genealogy works best when you understand that each testing company has its own pool of participants. Your closest genetic relative may have tested with a different provider, so a single database cannot reveal every possible connection.

Researchers often describe the idea of searching multiple databases as fishing in different ponds. The principle remains sound, but the available transfer routes have changed. Not every provider accepts raw DNA uploads, and eligibility can depend on the testing platform, the version of its array and the date the sample was processed.

A practical transfer workflow

1. Begin with your chosen testing company. Select a provider whose database and research tools fit your main objective.
2. Download your raw DNA data if available. Follow the company's current account-verification procedure. Keep the original file unchanged in a secure location.
3. Check FamilyTreeDNA eligibility. Its official transfer guidance lists accepted providers and file versions, with restrictions for some newer results. Free matching is available for eligible transfers, while certain advanced features require an additional payment. Read the current requirements at FamilyTreeDNA's autosomal transfer page.
4. Evaluate MyHeritage separately. New raw-data uploads are no longer supported. A separate MyHeritage DNA kit is required to join its matching service if you do not already have eligible results there. See the current MyHeritage upload policy.
5. Consider GEDmatch with care. GEDmatch provides third-party tools for genetic genealogy and comparisons across eligible datasets. Before uploading, review its current terms, data retention provisions, deletion options and law-enforcement matching settings at GEDmatch.

Important: A transfer is a copy of your genetic data, not a physical transfer of your sample. Each service may process the data differently, and matching results can vary. Upload eligibility, fees and available features can change, so verify them before planning your budget.

If your research involves adoption or unknown parentage, explore our specialist guide to DNA testing for adoptees and our collection of free genealogy tools.

04 — Protect Your Genetic Privacy

DNA data is unusually personal. It can reveal information not only about you, but also about biological relatives who may never have taken a test themselves. Privacy decisions should therefore be part of your research plan from the beginning—not an afterthought once your results appear.

Five settings and decisions worth reviewing

• Display name: Check whether the platform permits initials or a research alias. A pseudonym can reduce casual visibility, but it does not guarantee anonymity.
• DNA matching: Understand which information other participants can see and whether you can opt out of matching without deleting your entire account.
• Ethnicity estimates and family trees: Review the visibility settings for your reports, linked trees, surnames and other profile details.
• Research and law-enforcement policies: Read the current rules for investigative genetic genealogy, including any opt-in or opt-out choices. Do not assume that the same setting applies across all companies.
• Retention and deletion: Find out how to delete a test, remove uploaded data, request destruction of a stored biological sample where applicable, and revoke permissions granted to third parties.

Understand investigative genetic genealogy

Some genetic genealogy services have policies that permit certain law-enforcement searches, subject to their specific eligibility rules and legal requirements. Other services have different restrictions. These policies can change, and the rules may distinguish between cases involving violent crimes, unidentified human remains and other investigations.

Before enabling or disabling a setting, read the current policy for the specific service. For reference, consult the FamilyTreeDNA Law Enforcement Guide and the relevant privacy and matching policies published by GEDmatch.

Finally, remember that a genetic match may expose unexpected family relationships. Consider the possible implications for biological relatives before sharing match screenshots, family trees or identifying details publicly.

05 — Build Your First DNA Match-Analysis Workflow

When your results arrive, the number of matches can be overwhelming. The temptation is to begin clicking through every profile or to treat an ethnicity estimate as the answer to your family-history question. A more effective approach is to work systematically from the strongest evidence toward more distant possibilities.

Start with your closest matches

Begin with matches sharing substantial amounts of DNA, particularly those with usable family trees or known relationships. Record the amount of shared DNA in centimorgans (cM), the number of shared segments where available, any predicted relationship, and the evidence supporting your interpretation.

Do not treat a predicted relationship as definitive. Several relationships can share overlapping centimorgan ranges, and the same amount of shared DNA can fit different family structures. Use the Shared cM Project as a reference for possible relationships.

Use clustering to reveal family branches

When you have enough suitable matches, grouping them can reveal clusters that may represent different branches of your family. The Leeds Method is one established approach for organizing matches into groups.

These groups do not automatically correspond to four grandparents. The outcome depends on the relatives available, their relationships to one another, endogamy, pedigree collapse and the amount of DNA shared. Treat clusters as working hypotheses that require further evidence.

Compare trees and verify the evidence

1. Build a small research log. Record the match identifier, shared cM, potential relationship, tree link, relevant surnames and the source of each conclusion.
2. Look for shared ancestral couples. Compare documented parents, grandparents, locations and dates across several match trees rather than relying on one surname alone.
3. Separate facts from hypotheses. Mark which relationships are supported by original records, which are inferred from DNA and which remain unverified.
4. Investigate the documentary trail. Search civil registration records, census returns, parish registers, probate files, land records and other sources relevant to the region and period.
5. Test competing explanations. Ask whether the proposed relationship explains the DNA evidence and the historical timeline better than alternative hypotheses.

For additional support, explore our DNA Relationship Calculator, free genealogy templates, GEDCOM Tree Viewer and global genealogy resources by country. When using family-tree files, check the privacy of the files and the people represented before uploading or sharing them.

06 — Your First DNA Research Session

You do not need to solve your entire family tree in one sitting. Your first session should establish a reliable foundation, preserve your information and identify one manageable research question.

Frequently Asked Questions

What is the most cost-effective way to start DNA genealogy?

For many beginners, one autosomal DNA test is a sensible starting point. Compare the database, current price, regional relevance and research tools before purchasing. You can then investigate eligible data-transfer options, but do not assume that every major platform accepts uploads or that all advanced features are free.

How long do DNA test results take?

Processing times vary by provider, shipping route, laboratory workload and whether the sample needs additional processing. Several weeks is common, but there is no universal turnaround time. Check the current estimate supplied by your testing company and use its tracking dashboard for updates.

Should I pay for subscription upgrades immediately?

Not necessarily. Start by exploring the matching tools and records already available to you. Pay for additional features when you have a defined research question and understand how the upgrade could help answer it. Remember that DNA matching, historical records, raw-data access and advanced analysis tools may have separate pricing.

Can I upload my DNA file to every major genealogy database?

No. Upload policies vary and change over time. MyHeritage no longer accepts new DNA uploads from other testing services. FamilyTreeDNA accepts certain eligible files, subject to its current compatibility rules. Always check the receiving company's official policy before relying on a transfer strategy.

Can DNA prove that a particular person was my ancestor?

DNA can provide strong evidence for a biological relationship, but identifying a specific ancestor usually requires additional analysis. The strength of the conclusion depends on the matches available, the family structure and the quality of the documentary evidence. A well-supported conclusion combines genetic evidence with reliable historical records.

Your Genetic Journey Starts Here

Genetic genealogy becomes most powerful when technology and traditional research work together. A well-chosen DNA test can reveal connections that were previously invisible, but careful analysis, responsible data management and documentary verification turn those connections into a defensible family history.

Start with one test, one clear research question and a method for recording what you learn. Expand to other databases when it makes sense, protect the privacy of everyone involved, and remain open to evidence that challenges your initial assumptions.

Ready to put your findings into practice? Explore our free genealogy templates, organize your research with the GEDCOM Tree Viewer, or return to Part 1 of the Getting Started with DNA Testing for Genealogy series to review the full learning path.

Sources and Further Reading

• Theda C, Hwang SH, Czajko A, Loke YJ, Leong P, Craig JM. Quantitation of the cellular content of saliva and buccal swab samples. Scientific Reports, 2018.
• International Society of Genetic Genealogy. Autosomal DNA testing comparison chart.
• International Society of Genetic Genealogy. Centimorgan.
• International Society of Genetic Genealogy. Autosomal DNA statistics.
• Blaine T. Bettinger. The Shared cM Project.
• Dana Leeds. DNA Color Clustering: The Leeds Method for Easily Visualizing Matches.
• Ancestry. Downloading DNA Data.
• MyHeritage. Current DNA upload policy.
• FamilyTreeDNA. Autosomal DNA transfer options and requirements.
• FamilyTreeDNA. Law Enforcement Guide.
• GEDmatch. Platform information, terms and privacy policies.

Editorial note: Testing availability, transfer eligibility, processing times, pricing and privacy policies can change. Confirm current details directly with the relevant provider before purchasing a test or uploading genetic data.