Mitochondrial DNA implies that almost all modern dogs slide into a single of 4 monophyletic haplogroups which are named haplogroups A, B, C, and D. Many dogs drop in just haplogroup A. The mDNA "molecular clock" signifies that 22,800 YBP the very first genetic divergence (break up) occurred in haplogroup A, leading to the lineages A1b and A2. This