[ 1 ] See also Human Y-chromosome DNA haplogroup Haplogroup Q Haplogroup Q1a3 Evolutionary tree of Human Y-chromosome DNA (Y-DNA) haplogroups most recent common Y-ancestor A A1b A1a-T A1a A2-T A2 A3 BT B CT DE CF D E C F G H IJK IJ K I J LT K(xLT) L