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Louis Kessler’s Behold Blog » Archive for 2019

Using MyHeritage to get Triangulation Groups - Fri, 13 Dec 2019

MyHeritage has a very nice feature in their chromosome browser. If three or more people all triangulate over a segment, the browser will place a rectangle with rounded corners over the triangulating segment for you. These form a triangulation group. All of the people you select must all match each other on that ...

GEDmatch - Are You In or Out? - Tue, 10 Dec 2019

It’s already day-old news. GEDmatch has been purchased by Verogen. Less than 24 hours and the alarmist headlines regarding @VerogenBio and #GEDmatch are already driving me nuts — Cairenn (@cairennoid) December 10, 2019 For some of the reporting on this, see the following news posts: A ...

DMT - The Horizon Effect - Tue, 3 Dec 2019

In Version 3 of Double Match Triangulator, I added the ability to specify the smallest segment match that DMT would consider to be part of a valid triangulation (default 7 cM) and the smallest segment match that DMT would consider to be a valid single match (default 15 cM). A situation that can happen when ...

Genealogy is Virtually Everywhere - Wed, 13 Nov 2019

Last night, I attended a talk of a prominent genealogy speaker. This is a speaker who keynotes conferences and attracts thousands to her talks. Diahan Southard gave her talk “Your Slice of the DNA Pie”, and I watched it on my computer at home. It was a presentation of the Virtual Genealogical Association, ...

Using DMT, Part 2: My GEDmatch data - Thu, 24 Oct 2019

In my last blog post, I analyzed my segment matches at 23andMe with Double Match Triangulator,. This time let’s do the same but with my GEDmatch segment matches. Getting Segment Match Data from GEDmatch At GEDmatch you need their Tier 1 services (currently $10 a month) in order to download your segment ...

Using DMT, Part 1: My 23andMe Data - Thu, 17 Oct 2019

I am going to show you how I am using Double Match Triangulator, and some of the information it provides, at least for me. My own DNA match data is difficult to analyze. I come from a very endogamous population on all my sides that originates in Romania and Ukraine. The endogamy gives me many more matches than ...

DMT 3.1 Released - Wed, 16 Oct 2019

I’m working on a series of articles to show how I am using the new 3.0 version of Double Match Triangulator to analyze my own segment match data. As much as I’d like you to believe that I’ve developed DMT for the good of genetic genealogists everywhere, I humbly admit that I actually developed it so ...

The GEDCOM 5.5.5 Initiative and Making It Work - Sun, 6 Oct 2019

It’s been 35 years since GEDCOM 1.0 was released to the genealogical software development community in 1984. It’s been 20 years since GEDCOM 5.5.1, the last official specification by FamilySearch was released on October 2, 1999. Five days ago, October 2, 2019, the gedcom.org website was renewed containing ...

It Took a Lot of Effort to Get to DMT 3.0 - Sat, 5 Oct 2019

I’m cleaning up my directories after over 3 years of development of Double Match Triangulator. When I released Version 1 of DMT back in August 2016, I had it write information about the run to a log file, primarily so that I could debug what was going on. But I realized it is useful for the user as it could ...

Double Match Triangulator 3.0 Released - Tue, 1 Oct 2019

After 10 months of hard work, I have finally released DMT 3.0. You can download it from www.doublematchtriangulator.com. (It is a Windows program. My apologies to Mac or Unix users) All purchasers of DMT get a lifetime license. All updates including this one are free for past purchasers. There’s ...

23andMe’s Family Tree Beta - Mon, 23 Sep 2019

Someone on Facebook reported a new feature at 23andMe and I couldn’t wait to try it. This 23andMe beta “auto-builds”  your family tree from your DNA connections with other customers. They aren’t the first to try something like this. Ancestry DNA has ThruLines, which uses your tree and your DNA ...

The Life and Death of a DNA Segment - Mon, 19 Aug 2019

There’s a bad rumor going around that segment matches, especially for small segments, can be very old. I’ve heard expectations that the segment might come from a common ancestor 20 generations back or even 30, 40 or more. And that’s said to happen even if you have a fairly large 15 cM segment. Part of ...

50 Years, Travelling Salesman, Python, 6 Hours - Wed, 7 Aug 2019

This is my first blog post in over 2 months. The reason is that I have been working very hard trying to finish Version 3 of Double Match Triangulator. Every thing I’ve been doing with it is experimental, and there’s no model to follow. So it’s tough to get it just right. I started the documentation of the ...

Finally, Interesting Possibilities to Sync Your Data - Fri, 17 May 2019

Although I don’t use Family Tree Maker (FTM), per se, I am very interested in its capabilities and syncing abilities. FTM along with RootsMagic are the only two programs that Ancestry have allowed to use the API that gives them access to the Ancestry.com online family trees. Therefore they are the only two ...

Determining VCF Accuracy - Mon, 13 May 2019

In my last post, I was able to create a raw data file from the Whole Genome Sequencing (WGS) BAM file using the WGS Extract program. It seemed to work quite well. But my previous post to that: WGS – The Raw VCF file and the gVCF file, I was trying to see if I could create a raw data file from the Variant ...

Creating a Raw Data File from a WGS BAM file - Sun, 12 May 2019

I was wondering in my last post if I could create a raw data file that could be uploaded to to GEDmatch or DNA testing company from my Whole Genome Sequencing (WGS) results. I was trying to use one of the Variant Call Format (VCF) files. Those only include where you vary from the human reference. So logically ...

WGS – The Raw VCF file and the gVCF file - Tue, 7 May 2019

As I noted in my last post, Whole Genome: The VCF File, Part 2, the SNP VCF (Variant Call Format) file that Dante Labs gives tester of WGS (Whole Genome Sequencing), does not quite have everything that is needed to generate a raw data file that can be uploaded to various DNA sites for people matching. ...

Whole Genome: The VCF File, Part 2 - Mon, 22 Apr 2019

A couple of months ago, I compared my VCF file to my DNA test results. The Variant Call Format (VCF) file is given to you when you do a Whole Genome Sequence (WGS) test. That test finds your DNA values for your whole genome, all 3 billion positions, not just the 700,000 or so positions that a standard DNA ...

Compare Your Number of DNA Matches Among Companies - Sun, 21 Apr 2019

I saw a post on Facebook trying to compare the number of relative matches a person hade at different DNA testing companies. Here's my results with my endogamy: Note that there are a few things to consider when you or anyone else does a comparison of your number of DNA matches. A few companies only give ...

WGS Long Reads Might Not Be Long Enough - Wed, 17 Apr 2019

Today my Dante Labs kit for my Whole Genome Sequencing (WGS) Long Reads arrived. Dante became the first company to make WGS Long Reads available to the general public. The price they are charging is $999 USD, but past customers of Dante Labs are eligible for a $200 USD discount putting it down to $799. In 2016 ...

Advanced Genetic Genealogy - Sat, 13 Apr 2019

Living in Canada, I had to wring my hands waiting an extra two weeks over my US neighbors for my copy of Advanced Genetic Genealogy: Techniques and Case Studies to arrive. Packaged for me nicely and safely in bubble wrap, the book itself is physically impressive, larger than your average book:  Full ...

WGS Result Files - Sat, 13 Apr 2019

I received the rest of my raw data files for my WGS (Whole Genome Sequencing) test today. It was shipped from their lab in Italy and came on a 1 TB hard drive. Previously I was able to download my VCF files from Dante’s site. I reported on the files a couple of months ago in my post: My Whole Genome ...

Combine Kits into One Superkit on GEDmatch Genesis - Sat, 6 Apr 2019

Today GEDmatch Genesis added a new Tier 1 application. They state: I did that myself manually with 5 kits about 6 months ago, uploaded my combined raw data to GEDmatch Genesis, and reported the results in my post: The Benefits of Combining Your DNA Raw Data. I thought I’d try the new GEDmatch Genesis ...

Genetic Affairs Clustering at 23andMe - Wed, 20 Mar 2019

Today Evert-Jan Blom, author of Genetic Affairs and the new clustering algorithm implemented by MyHeritage DNA, posted on the Genetic Genealogy Tips & Techniques group on Facebook. He announced some improvements to his AutoCluster analysis on Genetic Affairs for 23andMe matches. He posted: A well known ...

Small Segment Matches - Tue, 19 Mar 2019

Blaine Bettinger posted a poll on his Genetic Genealogy Tips and Techniques Facebook group about 7 hours ago. It is a closed group, but if you are a member you can see the poll here.  In four hours, the poll got almost 800 responses and over 350 comments. Blaine asked people to go to GEDmatch Genesis and ...

Inferred Segment Matches - Thu, 7 Mar 2019

When we match our DNA to other people to find common ancestors, we are comparing segments of DNA that match the other people. That’s only logical, isn’t it. Well, interestingly enough, there’s a technique that will help you determine which ancestors your DNA comes from by using non-matches. Actually, you ...

MyHeritage New AutoClustering Feature is now Live - Fri, 1 Mar 2019

Another new feature announced during #RootsTech is the MyHeritage DNA integration of Evert-Jan Blom’s AutoClustering method. MyHeritage has become the first major DNA service to offer clustering. MyHeritage’s blog post Introducing AutoClusters for DNA Matches was posted yesterday and describes their new ...

DNA meets Trees at AncestryDNA and MyHeritage DNA - Wed, 27 Feb 2019

Today’s the first day of #RootsTech. This is the day that many of the genealogy companies announce new features on their site. So it is not ironic at all that today, both AncestryDNA and MyHeritage DNA announced a new feature that matches up your tree with the trees of your DNA matches and shows you the ...

My Whole Genome Sequencing. The VCF File - Wed, 6 Feb 2019

I received my results from my Dante Labs Whole Genome test last week. I purchased the test last August when I was able to get it for $399 USD. There were two health reports that I requested that are written in ancient Latin as far as my understanding of them goes. Then there were the VCF files which I was more ...

Comparing Genetic Clusters - Tue, 22 Jan 2019

In my last post, I described how I obtained my results from three Genetic Clustering tools:  Genetic Affairs – by Evert-Jan Blom Collins’ Leeds Method 3D – at DNAGedcom Shared Clustering – by Jonathan Brecher Pretty pictures are nice to look at. But what we really want is to be able ...

Genetic Clusters and DNAGedcom - Sun, 20 Jan 2019

Over the past 6 months, everyone has been jumping on board using genetic clustering techniques to help them partition their DNA matches into their ancestral origins. The basic idea is to compare all the people that each of your DNA matches also match to. These are not segment matches being compared, but are ...

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