Partial matches on Triangulated DNA segments

What does a triangulated segment of DNA mean?

Triangulated segments are segments that all of the selected DNA Matches share with each other. This capability is important for understanding DNA Matches’ relationships because triangulated segments are more likely to be inherited from a common ancestor.

What is a triangulated DNA match?

DNA triangulation involves three or more persons sharing the same DNA segments. Three or more persons who are matching share DNA is not enough. You actually have to share DNA all on the same segment on a specific chromosome. Meaning a specific location with similar start and endpoints on that same chromosome.

What does DNA overlap mean on 23 and Me?

Overlap at 23andMe



An overlap simply means that two people match you on the same portion of DNA. Someone from your Mom’s side and someone else from your Dad’s side will both match you on a segment of DNA in the same location on a chromosome, shown above.

What does no shared DNA segments mean?

What does it mean when no shared DNA segments are found? When no shared DNA segments are found, it means that there is no shared DNA found at the default segment size settings. Many times, this means that you are not genealogically related to the person whose DNA you compared to yours.

Can you triangulate DNA on ancestry?


Quote from video: But whenever we're talking about ancestry this is the only kind of triangulation. That we can do on ancestry.

What does shared matches mean on ancestry DNA?

A shared match is someone who appears both on your list of matches and on someone else’s. For example, if Frank and his uncle Darnell both have Frank’s sister Angela on their list of matches, Angela is a shared match. You can see which matches you share with 4th cousins and closer.

Can you share DNA and not be related?

Yes, it is possible to share a small amount of DNA with someone and not be related. In other words, it’s possible to share genetic material and not share a common ancestor or any identifiable genealogical connection.

How much DNA do you share with ancestors?

You can’t inherit more than half of an ancestor’s DNA.



You receive 50% of your genes from each of your parents, but the percentages of DNA you received from ancestors at the grandparent level and further back are not necessarily neatly divided in two with each generation.

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