Mitochondrial DNA implies that nearly all modern dogs slide into a single of 4 monophyletic haplogroups which happen to be named haplogroups A, B, C, and D. Virtually all dogs fall in just haplogroup A. The mDNA "molecular clock" signifies that 22,800 YBP the first genetic divergence (split) happened in haplogroup A, leading to the lineages A1b and