by DNA-Sci | Feb 12, 2021 | Blog, DNA Science
You probably got here from this page. If not, it’s probably a good idea to go look at it and see what this page is about before continuing. Many of the statistics here won’t actually be viewable at AncestryDNA. The real purpose of this page is to provide...
by DNA-Sci | Jan 5, 2021 | Blog, DNA Science
People often ask how their DNA match with a cousin will be inflated if they have a double relationship with that cousin. Some helpful people have offered that you can look up shared averages and ranges for certain relationships and double all of them, or for two...
by DNA-Sci | Dec 31, 2020 | Blog, DNA Science
The amount of centiMorgans (cMs) we share with a relative tells us how closely related we are to them. Most people think about cM as a length. In fact, geneticists refer to it as “genetic length.” A smaller subset recognize that cM is the probability, in...
by DNA-Sci | Dec 1, 2020 | Blog, DNA Science
Using very simple math to get the most out of multiple kits Many genetic genealogy enthusiasts have their own DNA genotyped as well as some of their siblings. As the enthusiast of your family, you might have access to all of these kits. Or, if they’re all on...
by DNA-Sci | Oct 23, 2020 | Blog, DNA Science, Probability and Statistics
A formula to improve the estimation of 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 be...
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...
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