Mathematical Formulas for Genetic Genealogy

Mathematical Formulas for Genetic Genealogy

by | Oct 10, 2021 | Blog, DNA Science

This post won’t be everyone’s cup of tea. But I’ve used these formulas countless times in programming in order to automate processes, which saves me a lot of time and work and prevents errors. Ethnicity The first time I ever wrote a formula for...

Small Segments: Are We Asking the Wrong Question?

by | Sep 14, 2021 | Blog, DNA Science

Small segments affect most of our matches, whether we think we’re using them or not. I don’t know that I would call it a debate, but the discussion about low centiMorgan (cM) DNA segments continues with fervor. And I almost never hear any arguments from the...

Shared X-DNA Between Relatives

by | Sep 7, 2021 | Blog, DNA Science

X Chromosome averages and ranges are now available for the first time ever Remember to use the most accurate relationship predictor to find out how you might be related to your DNA matches. The 23andMe percentage input box is the only place where you can get...

What is an accurate dataset in genetic genealogy?

by | Aug 19, 2021 | Blog, DNA Science

The most important aspect of genetic genealogy that nobody talks about It first occurred to me to write this article about a year ago. I thought that I had much more important articles to write and tools to create, but I’ve recognized that the need for an...
3/4 Siblings: You Can Tell the Difference

3/4 Siblings: You Can Tell the Difference

by | Aug 5, 2021 | Blog, DNA Science

We can now easily differentiate between 3/4 siblings and full-siblings over 94% of the time Three-quarter siblings have been confounding genetic genealogists for years. The problem is that their shared DNA overlaps significantly with other sibling types. And, while...