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This project is a meeting place for users who share the R1b1a2a1a1b3c Y-DNA haplogroup, which means they are related along their paternal lines. Users in this group may want to share their family trees with each other to find overlaps and merge duplicate profiles in order to join or expand the World Family Tree and discover new relatives.
According to the ISOGG 2011 tree, this notation denotes the mutation known as S28/U152.
According to the YFull tree, this mutation is approximately 4500 years old, and the list of parent haplogroups connecting it to the large R group is R > R-Y482 > R1 > R1b > R-L278 > R-L389 > R-P297 > R-M269 > R-L23 > R-L51 > R-L151 > R-P312