by DNA-Sci | 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 DNA-Sci | Sep 23, 2020 | Blog, DNA Science
I’ve been brought in to work on several cases in which incest has been suspected and later confirmed in a family. The first thing I’d like to ask someone when they discover that there’s incest in their family is if they need to talk to someone....
by DNA-Sci | Aug 19, 2020 | Blog, DNA Science
Update, 3 March 2020: When I finally thought to share this information, I found out that I wasn’t the only person to have ever tried it. Still, I was encouraged to quickly finish writing up my methodology, as there weren’t any other instructions available....
by DNA-Sci | May 18, 2020 | Blog, DNA Science
How to automatically identify your most important DNA matches I recently had this idea for a project in Python that could save me a lot of work: What if a computer program could identify your most important DNA relatives? I was sure that the results wouldn’t be...
by DNA-Sci | May 15, 2020 | Blog, DNA Science
Previous cousin statistics charts haven’t shown the differences in shared DNA between paternal and maternal relatives. The average recombination rate in mothers is about 42. Conversely, genomes in fathers only recombine about 27 times, on average. This leads to...
by DNA-Sci | May 8, 2020 | Blog, DNA Science
A comparison of three models, including updated amount of shared DNA between various relatives and ancestors Note: this article is relatively old. I’ve updated my model to be far more accurate, in light of recently published standard deviations, and far more...
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