The Reconstructed Sapiens Reference Sequence (RSRS) is a mitochondrial DNA (mtDNA)reference sequence that uses both a global sampling of modern human samples and samples from ancient hominids. It was introduced in early 2012 as a replacement for the rCRS (revised Cambridge Reference Sequence). Because it is based on the likely modal haplotype of the common ancestor to both modern humans and such ancient groups as the Neanderthals, it shows an unbiased path back from any one modern mtDNA sequence to our distant common maternal ancestor.

Do you remember me telling you that many Native American Group do not show up in DNA test due to not enough information about these groups are in the National Data Base? This could be why I have a "G" result but is not on the chart. Groups "A" and "C" is on the map coming across Asia and Alaska into the Unites States. They are probably Native American Groups. 
mtDNA is the genetic material found in mitochondria. It is passed down from females to both sons and daughters, but sons do not pass down their mother’s mtDNA to their children.