Two of these possessed the Western Eurasian mtDNA U5a1 and U4 lineages. Two other ones exhibited the Y-chromosome haplogroup R1a1, which is thought to mark the eastward migration of the early Indo-Europeans. The individuals surveyed were all determined to be Europoid and light-eyed. References Citations Sources Bronze Age cultures of Asia Archaeological cultures of Siberia Archaeological cultures of Central Asia Iranian archaeological cultures Archaeological cultures in Kazakhstan Archaeological cultures in Russia