Using Genome Mate (Add confirmed segments to chromosome map)

The previous article in this series is Using Genome Mate (Identify triangulated groups and confirm segments).

In following the steps that have been previously outlined, we now know how to identify triangulated groups and confirm the segments within a triangulated group. This post will show the steps to add these triangulated segments to our chromosome map.

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Using Genome Mate (Identify triangulated groups and confirm segments)

The previous article in this series is Using Genome Mate (Importing/Updating the email addresses of your matches from GEDmatch).

In following the steps that have been previously outlined, we now have imported a sizable amount of data from GEDmatch into Genome Mate. This post will show how to begin working with this data to identify groups of triangulated segments. The process of identifying triangulated groups can be very time consuming, and like genealogy itself, is something that is never ending. The concepts of identifying triangulated groups are fairly simple to grasp, but there is no shortcut to taking the necessary time to work through and analyze your DNA data. As one leading genetic genealogist, Dr. Blaine Bettinger (, summed it up so accurately, “Finding genetic matches is easy, but finding the common ancestor from whom we inherited a segment [of] DNA is very hard.”

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Steps to DNA Matching and Chromosome Mapping with GEDmatch and Genome Mate

For awhile now, I’ve planned to write a summary of the steps to using GEDmatch and Genome Mate for chromosome mapping. Based on some great feedback and suggestions from Roberta, one of my blog readers, I’m going to go ahead and post this summary now, instead of waiting until I have completed the step by step guides for the entire process. My hope is this will help people to begin making the most efficient use of their DNA data right away, as well as letting people know what topics I will be covering next in the process. As I continue to add the rest of the step by step guides, I will update this post by adding the links to the new guides after I have completed writing them. In addition, I hope to keep evolving this post by incorporating new methods and tools that may become available for working with one’s genealogical DNA data.

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Using Genome Mate Part 3 (Importing GEDmatch Chromosome Browser Data)

The previous article in this series is Using Genome Mate Part 2 (Importing GEDmatch One To One Comparison Data).

Thanks to some great programming work by Becky Walker, the developer of Genome Mate, there is a new option for importing lots of match data at a time into Genome Mate, using Sue Griffith’s method of an alternate to the GEDmatch triangulation tool for locating shared segments with other testers (as also shown step by step in my last blog post). In this blog post, I will walk through the new Genome Mate import process step by step.

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Using GEDmatch Part 3 (The People Who Match One Or Both Of 2 Kits Tool)

The previous article in this series is Introduction To Using GEDmatch Part 2 (The One-To-Many Comparison Tool).

It’s taken me awhile to post another article in this series because I was hoping the Triangulation tool would be reinstated by now. Since it has not, let’s explore the People who match one or both of 2 kits tool that has recently been reinstated. For each of the matches we get to our kit using the ‘One-to-many’ matches tool, it is very helpful to know who else happens to match both of our DNA tests. This can help us begin to identify shared segments between at least three people, forming the basis for properly triangulating the segment back to a common ancestor, or set of ancestors. Continue reading

Using GEDmatch Part 2 (The One-To-Many Comparison Tool)

The previous article in this series is Introduction To Using GEDmatch.

Now that we know how to do ‘One-to-one’ comparisons at GEDmatch, and the importance of doing triangulation on matching segments, let’s take a look at the ‘One-to-many’ comparison feature available on the GEDmatch website. The ‘One-to-many’ tool will give us a list of our closest DNA matches found on the GEDmatch site. Continue reading

Introduction To Using GEDmatch

This is the first post in my series on how to use GEDmatch ( My goal in writing this post is to provide an introduction to using GEDmatch to do comparisons, and explain the basic fundamentals of chromosome mapping, in an easy to understand manner with simple to follow instructions. Continue reading