Here’s a summary of new features at DNA Painter that I’ve released in the last couple of weeks.
I’m pleased to release a new tool today called the Shared cM Investigator. Intended for those who have siblings tested, but not the parents of those siblings, the tool uses segments and a simple mathematical equation to estimate how much DNA the parent of those siblings might have shared with the match.
For this first guest post, I’m pleased to welcome Lara Diamond, whose popular blog Lara’s Jewnealogy has been running since 2013. Endogamy has a very visible effect on chromosome mapping, as Lara explains very clearly
I recently became an ambassador for the Hidden Branch, a group that advocates for young genealogists. I’m really pleased to be involved in the endeavour of encouraging take-up of our hobby and helping the next generation get involved. I got some interesting responses from group members when I asked about their background, interests and experience with DNA.
As part of your ongoing DNA work, you might sometimes like to merge chromosome maps together or use data from one map in another. In this post I recap on the different ways you can duplicate and copy data between chromosome maps.
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Distinct segment generator
As announced last month in the newsletter, the new distinct segment generator tool allows you to amalgamate a set of segments that more than one family member shares with a specific match. The tool will then output just the distinct segments, with the centimorgans (cMs) recalculated.
Launched in late 2020, the inferred segments generator helps users calculate the segments they can infer from the DNA their close relatives share with others. This can be a confusing concept. I recently added a small additional feature to the tool that can help you infer segments from a grandparent.
An interesting DNA match to my mother-in-law Lynn* and her maternal aunt (Ann) appeared this week. In this article I’ll review how I interpreted their match with Tom alongside methods for interpreting inferred segments when working with a full aunt: What can I infer about Lynn’s DNA from the segments her aunt Ann shares with
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Top recurring FAQs
I’ve just released a new homepage with a succinct summary of what you can do at DNA Painter. In addition to this, I’m presenting this new page answering some of the questions that come up again and again.
There’s a new feature in the Shared cM Project tool. You can now view the list of potential relationships for a specific number of cM shared in a tree format. Here are some notes on how this new feature works.