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Porcupine DNA Chart

By DD / January 9, 2016

Understanding the Porcupine DNA chart will help you see how DNA is passed down from different ancestors. Not all of your relatives will be your DNA relatives necessarily and some will not appear as DNA relatives unless you take the matching segments down to a very small number like 3 cM.

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Genealogical Relationship Chart Based on cM

By DD / October 4, 2015

Blaine Bettinger has been collecting statistics from the genetic genealogy community on the number of shared centiMorgans for known genealogical relationships as part of his shared cM project. The chart below is a visualisation of the range of shared centiMorgans for close relations up to the third cousin level based on data supplied to the […]