| 1. DNA Heritage |
| A commercial laboratory specializing in Y-chromosome testing for genealogists. US office in Rochester, New York, and UK office in Weymouth, Dorset. |
| http://www.dnaheritage.com |
| 2. Family Tree DNA |
| Establishing DNA fingerprints for the purpose of determining ancestral pedigrees. Testing is available to both amateur and professional genealogists. Headquarters in Houston, Texas. |
| http://www.familytreedna.com/ |
| 3. Geo Gene |
| Using DNA obtained through a simple mouth swab to trace lineages back more than 100,000 years. Offices in the US and UK. |
| http://www.geogene.com/ |
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| 4. Oxford Ancestors |
| A venture backed by Oxford University to harness the power and precision of modern genetics in the service of genealogy. |
| http://www.oxfordancestors.com/ |
| 5. Relative Genetics |
| Genetic genealogy applies DNA testing to paper-based, genealogical research. A business unit of Sorenson Genomics, located in Salt Lake City, Utah. |
| http://www.relativegenetics.com |
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