According to a study using molecular genealogy, Y-chromosome haplotypes from the Lu clan in northwestern China, who claim to be descendants of
Genghis Khan’s sixth son, Toghan, mostly belong to the Y-chromosome haplogroup C2b1a1b1-F1756. This haplogroup is widely distributed among Altaic-speaking populations and is closely related to the Tore clan from Kazakhstan, who claim descent from Genghis Khan’s first son,
Jochi. The most recent common ancestor of the haplotype cluster, which includes the Lu and Tore clans, lived about 1000 years ago. Members of the Huo and Tuo clans, who, according to oral tradition, were close male relatives of the Lu clan, do not share common Y-chromosome lines with the Lu clan. Therefore, the haplogroup C2b1a1b1-F1756 may be another candidate for the true Y-chromosome lineage of Genghis Khan. According to an international group of geneticists studying Y-chromosome data, in 2003, almost 8% of men living within the former Mongolian Empire (0.5% of the world's population) had almost identical Y chromosomes. Accordingly, in 2003 there were about 16 million descendants of Genghis Khan. ==References==