DOG - AN OVERVIEW

Mitochondrial DNA suggests that nearly all modern dogs fall into one of 4 monophyletic haplogroups which might be named haplogroups A, B, C, and D. Many dogs drop in just haplogroup A. The mDNA "molecular clock" implies that 22,800 YBP the very first genetic divergence (break up) transpired in haplogroup A, leading to the lineages A1b and A2. This