THE 2-MINUTE RULE FOR PET

Mitochondrial DNA suggests that just about all modern day dogs fall into just one of four monophyletic haplogroups which happen to be named haplogroups A, B, C, and D. Virtually all dogs fall in haplogroup A. The mDNA "molecular clock" indicates that 22,800 YBP the primary genetic divergence (split) happened in haplogroup A, resulting in the lineag