About Mutation Rates
Family Tree DNA
It is obvious from our observation of 1000's of samples
that some markers change or mutate at a faster rate than others. While
that actual 'faster rate' has not yet been definitively calculated, not
all markers should be treated the same for evaluation purposes.
The markers in magenta have shown a faster
mutation rate then the average, and therefore these markers are very
helpful at splitting lineages into sub sets, or branches, within your
Explained another way, if you match exactly on all of the markers except
for one or a few of the markers we have determined mutate more quickly,
then despite the mutation this mismatch only slightly decreases the
probability of two people in your surname group who match 11/12 or even
23/25 of not sharing a recent common ancestor.