Many people have asked me about the use of their DNA by law enforcement. Some are concerned, others just curious. So here is how it works. First of all, there are only two commercial databases where law enforcement is allowed in.  Both of those, GEDmatch and Family Tree DNA (ftDNA), require you to opt in to that usage and inform you about it in their terms. There is also one non-profit – DNA Justice – just for Law Enforcement, where you can choose to opt in to be informed if your DNA solved a case. In order for your DNA to be helpful for solving cases, you have to upload your DNA tes ..read more

Ancestry has released a new feature that many of us have been eagerly waiting for: how much DNA your matches share with each other and the estimated relationship between them. This can help when a new match has no tree, for example, if their sibling or parent has one. Read on for a description of my first experiments with this tool. Most Mondays I go look at my new DNA matches on Ancestry. Typically I first click Unviewed and then click Common Ancestors. The buttons I click (added arrows are mine) If no matches come up, then I unclick the Common Ancestors button in order to see all the new m ..read more

GEDmatch is one of my favorite sets of genetic genealogy tools but it can be hard to get started with. I have done many presentations over the years attempting to help people master the basics there, most recently for Family Tree University (click here). Plus I wrote a GEDmatch Basics article for their magazine (click here) which explains all the column headings on the one-to-many report. Over the past 12 years I have written many posts about GEDmatch, most of which are still useful. So I decided to make a new tag – GEDmatch tools – which brings up just my posts that e ..read more

The people behind the current GEDmatch have been working hard to improve its usability and its appearance. Tom Osypian, the QIAGEN GEDmatch Product Manager, gave a talk at the recent Rootstech about what’s new there. I hope some of you went to that! I was sad not to make it this year, other than virtually. Meanwhile on this Thursday March 7, I will be giving an updated version of my talk on GEDmatch Basics for Family Tree University.  This webinar is designed to help the new user understand how to use the terrific tools on that site. Now to list the main new features. Most every functio ..read more

One of the most unusual talks at the recent i4GG conference (videos coming soon) was the one about the use of AI for genealogy by Steve Little, the AI program director for the National Genealogical Society (NGS).  I learned that it was how you phrased your question that could lead to more accurate answers, e.g. “you are a professional genealogist … ” I found out that AI, particularly the paid versions, could extract text from documents, even handwritten ones and translate in context. Here is my favorite slide from that talk. Personally my first impression of ChatGPT had bee ..read more

Every year genetic genealogists gather in San Diego in February for the i4GG conference founded by CeCe Moore and Dr. Tim Janzen. This year is the tenth anniversary and I am honored to be one of the presenters again. Click here for the i4GG web site. In past years I have talked about the new features at GEDmatch. In 2022, this was a particularly dense lecture. (click here for the slides), as there were so many new and enhanced features. Clustering was taking the community by storm and GEDmatch has two versions of that, one of which even includes tree building. This year, I will talk abou ..read more

The recent panic about hacking at 23andme in the press seems overblown to me. What exactly would someone do with my DNA? There is nothing in there of any monetary value nor do I have health risks that need to be private. Perhaps knowing which celebrities are Jewish or Chinese might be of use to some bad actors. The fact is that those lists are for sale on the dark web. Click here for an interesting article about that. We have all been advised to guard our online privacy but our DNA is not our social security number nor our credit card so I am not worried about this yet. The hackers were able t ..read more

My Dad’s Norwegian great great grandfather, Lars Monsen, was originally from the Bergen area we had been told. He left his ship to marry a girl from Farsund and then settled in Kristiansand. My cousin Dick and I tried to find records about him, but this name was quite common in Hordaland (think Tom Smith). There were 10 candidates for our Lars in the Bergen area, so I used Y DNA testing to figure out which one he was. This is discussed in several previous blog posts (click here and here) Kristiansand Boat Basin 2015 Sigmund, a friend in Norway, found a paternal line descendant of Ole Mo ..read more

Many people who see that their ethnicity estimate from a DNA test is way off, think that they cannot trust the other findings from that testing company. That is a false assumption. When you are shown people who share DNA with you, aka DNA matches, they really are your relatives, although some can be quite distant. What the relationship actually is may not be predicted very accurately, as many relationships share similar amounts of DNA. Examples of that are a grandparent and an aunt or a 2nd cousin and a first cousin once removed. Thus you are usually shown a range of possible relationships. Fi ..read more

Did you know that Ancestry can figure out how you are related to a DNA match if you both have trees linked to your DNA tests? You do not have to have anyone further back than your parents if other relatives have more extensive trees on Ancestry that include your family, So how do you link your tree to your DNA? First log into Ancestry.com. Then click on DNA Result Summary in the pull down menu under DNA. Next click the gear on the far right that says Settings next to it as shown in the image below. Once you are on the Settings page, scroll down to the words DNA and family tree linking ..read more