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Mitochondrial DNA signifies that just about all modern day dogs fall into a person of four monophyletic haplogroups which happen to be named haplogroups A, B, C, and D. Virtually all dogs drop in just haplogroup A. The mDNA "molecular clock" indicates that 22,800 YBP the 1st genetic divergence (split) transpired in haplogroup A, causing the lineage