by Brit Nicholson | Dec 28, 2020 | DNA Code
I’ve written two Python algorithms that I describe in this article. The algorithm below works for downloaded segment-level match files from GEDmatch. The other algorithm, found here, is for match files downloaded from MyHeritage. # Copyright (c) 2020 Brit...
by Brit Nicholson | Oct 23, 2020 | Blog, Probability and Statistics
A formula to improve your ability to estimate the genetic relationship between two parents GEDmatch has had a tool called “Are Your Parents Related” (AYPR) for a few years now. The tool is helpful and easy to use. Some have argued that this information shouldn’t...
by Brit Nicholson | Sep 29, 2020 | Blog, Probability and Statistics
What’s the probability that two children share one whole copy of the X Chromosome without sharing a father? I’ve made an X Chromosome model that predicts shared X DNA percentages and ranges for various ancestors, but I haven’t yet calculated ranges...
by Brit Nicholson | Sep 23, 2020 | Blog, DNA Science
I’ve been brought in to work on several cases in which incest has been suspected in a family. Some of these cases involve a woman having a child with a brother or uncle. The first thing I like to ask someone when they discover that there’s incest in their...
by Brit Nicholson | Aug 19, 2020 | Blog, DNA Science
I started using a free application called Gephi to turn my DNA segment-level matches into clusters in early 2017. It didn’t seem as useful once MyHeritage came out with their AutoCluster tool. However, there are quite a few things you could do with Gephi that I...
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