reading See also Supplementary Material. A copy can be found here . A copy can be found here . External links DNA Tree FTDNA R1a Y-chromosome Haplogroup Project R1a1a1 and Subclades Y-DNA Project – Background Family Tree DNA R1a1a1 TMRCA TMRCA = Time to Most Recent Common Ancestor Various Danish Demes Regional DNA Project: Y-DNA Haplogroup R1a Eurogenes Blog, The Poltovka outlier Avotaynu Online, The Y-DNA Fingerprint of the Shpoler Zeida, a Tzaddik Who Touched the World R Indo-European genetics R