In human genetics, a human mitochondrial DNA haplogroup is a haplogroup defined by differences in human mitochondrial DNA. These haplogroups have led some researchers to trace the matrilineal inheritance of modern humans back to human origins in Africa and the subsequent spread across the globe.
Known haplogroups are assigned the following letter codes: A, B, C, CZ, D, E, F, G, H, pre-HV, HV, I, J, pre-JT, JT, K, L0, L1, L2, L3, L4, L5, L6, L7, M, N, P, Q, R, S, T, U, UK, V, W, X, Y, and Z.
The woman at the root of all these groups was the most recent common matrilineal (female-lineage) ancestor of all living humans. She is commonly called Mitochondrial Eve.
Evolutionary relationship
Precise evolutionary relationships between human mitochondrial haplogroups are subject to academic debate.
Other forms
For a graphical depiction of haplogroup branching, see Vincent Macaulay's mtDNA haplogroup skeleton.
For information on the mutations which characterize each haplogroup, see the table of mtDNA haplogroup motifs.
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