ELI5- How do people find lost or unknown relatives through DNA if the lost relative has never taken a DNA test?

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I just read a story about a woman who was reunited with her family after the dad took a DNA test and it said he had a daughter, but she hadn’t taken a test. How can a DNA test ‘find’ relatives if only one of the people have taken a test?

link to mentioned story:

[https://www.wfaa.com/article/news/local/melissa-highsmith-missing-fort-worth-woman-reunited-with-family-51-years-later/287-d2e9542e-f699-40df-86df-8f1fb9b8c25c](https://www.wfaa.com/article/news/local/melissa-highsmith-missing-fort-worth-woman-reunited-with-family-51-years-later/287-d2e9542e-f699-40df-86df-8f1fb9b8c25c)

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4 Answers

Anonymous 0 Comments

Unfortunately the story doesn’t go into detail on who the “two boys and a girl” are, so I can only assume that they are Melissa/Melanie’s children. If one of them took a DNA test, it would show DNA matches. The story just doesn’t say where that information came from.

Without testing, you would have no idea. So there must have been someone down that family line that was tested.

Edit: you could always hop over to Twitter and ask the reporter for clarification

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