by Brit Nicholson | Jul 19, 2021 | Blog, DNA Science
That’s a common questions I see from people researching their DNA matches. Until now the only answer we could give was “because DNA is variable.” That’s a correct answer. But we could provide something more useful: A quantitative answer. When...
by Brit Nicholson | Apr 6, 2021 | Blog, DNA Science
Relationship predictions are now updated to include differences in maternal and paternal recombination rates as well as validation of ranges by peer-reviewed standard deviations The calculator can be found here. I’ve previously published exact averages and very...
by Brit Nicholson | Mar 2, 2021 | Blog, DNA Science
People often ask a question similar to this one: If my ethnicity report is showing 5% Iberian, how far back should I expect to find an ancestor of mine who was Iberian? There’s a mathematical way to estimate the answer to that question. I’ll discuss that...
by Brit Nicholson | 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 Brit Nicholson | Dec 31, 2020 | Blog, DNA Science
The amount of centiMorgans (cM) we share with a relative tells us how closely related we are to them. A cM is the probability, in percentage, that a crossover will occur between two genetic loci during a given meiosis event. The units of cM are right there in the...
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