Brit Nicholson·Mar 9, 2022Double Cousin Relationship Predictions with Ped-simDouble cousin predictions are now updated with many more relationship types and a peer-reviewed data source
InAlexandria SciencebyBrit Nicholson·Oct 19, 2021A Banner Year for DNA-SCI.comIt will be hard to capture all of the discoveries that have been made and posted at this site in the past twelve months.
InAlexandria SciencebyBrit Nicholson·Apr 6, 2021A New Probability Calculator for Genetic GenealogyRelationship predictions are now updated to include differences in maternal and paternal recombination rates as well as validation of…
Brit Nicholson·Mar 4, 2021DNA Coverage with Multiple KitsHow much of an ancestor’s or relative’s DNA can you reproduce when you combine kits of multiple testers?
Brit Nicholson·Mar 3, 2021Why does 23andMe show that I share an unusually high amount of DNA (50%) with my full-sibling?Alternate title/misleading answer: 23andMe counts FIR twice
Brit Nicholson·Mar 3, 2021How far back is the ancestor who gave me a particular ethnicity?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…
Brit Nicholson·Jan 6, 2021Can You Just Add the Averages and Ranges for Double Relationships?People often ask how their DNA match with a cousin will be inflated if they have a double relationship with that cousin. Some helpful…
Brit Nicholson·Dec 1, 2020Your Siblings Have DNA Kits, too? Use Them to Their Full Potential.Using very simple math the get the most out of multiple kits.
InAlexandria SciencebyBrit Nicholson·May 18, 2020How Much of an Ancestor’s or Relative’s DNA Do You Have?After two years of genetic modeling and simulation, I believe I’ve finally arrived at just about the best model I can make
InAlexandria SciencebyBrit Nicholson·May 18, 2020New and Improved Autosomal Genetic ModelA comparison of three autosomal models, including results of the new model that predicts the amount of shared DNA between various…A response icon1A response icon1
