The dog Diaries
Mitochondrial DNA indicates that almost all modern day dogs slide into just one of four monophyletic haplogroups that happen to be named haplogroups A, B, C, and D. Nearly all dogs tumble in haplogroup A. The mDNA "molecular clock" suggests that 22,800 YBP the 1st genetic divergence (break up) occurred in haplogroup A, resulting in the lineages A1b