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Lectures and Appearances

DNA Painter at RootsTech 2025

This year’s RootsTech conference is in March. DNA Painter will be exhibiting for the sixth time (and the fifth time in person). You can read about previous visits in my blog post from last year.

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Tips Tools WATO

WATO vs WATO plus

What are the Odds? (WATO) can be very helpful for those investigating genealogical mysteries such as unknown parentage.

In 2024, I released an overhauled version of WATO: WATO plus. In this short post, I’ll explain the main differences between these versions.

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Categories
Guest posts Inferred Chromosome Mapping Tools

Mapping an untested grandparent’s DNA

Inferred chromosome mapping is a fun, puzzle-like technique that I discussed in this post from 2017. This often involves using a sibling or parent test to infer additional information from DNA matches. In 2020 I launched the inferred segments generator to make this process easier. In the following guest post, Josh Hutchings demonstrates how he has used the tool with grandparent segments.

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