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Mitochondrial DNA signifies that nearly all present day dogs drop into just one of 4 monophyletic haplogroups which might be named haplogroups A, B, C, and D. The vast majority of dogs drop inside of haplogroup A. The mDNA "molecular clock" indicates that 22,800 YBP the 1st genetic divergence (split) transpired in haplogroup A, resulting in the lin