What is haplogroup?

Haplogroup

In molecular evolution, a haplogroup (from the Greek: απλούς, haploûs, "onefold, single, simple") is a group of similar haplotypes that share a common ancestor having the same single nucleotide polymorphism (SNP) mutation in both haplotypes. Because a haplogroup consists of similar haplotypes, this is what makes it possible to predict a haplogroup from haplotypes. A SNP test confirms a haplogroup. Haplogroups are assigned letters of the alphabet, and refinements consist of additional number and letter combinations, for example R1b1. Y-chromosome and mitochondrial DNA haplogroups have different haplogroup designations. Haplogroups pertain to deep ancestral origins dating back thousands of years.

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Some articles on haplogroup:

Paglicci 23
... The paper does not assign any haplogroup to the results as the mtDNA segment is too small to draw any conclusions in this regard ... Many haplogroups, however, are defined by mutations in this segment as indicated in the table below ... Haplogroup Position of defining mutation JT 16126 U1 16249 U2 16051, 16129C U3 16343 U4 16356 U5 16270 U6 16172, 16219 U7 16318,T K 16224, 16311 B 16189, 16217 F 16304 As a result, the sample can confirm ...
Late Glacial Maximum - Genetics
... The European distribution of Y-chromosome haplogroup R1a has been suggested to have occurred as a result of receding glacial activity allowing males bearing the lineage from the ... Alternatively, it has been proposed that males from Haplogroup Hg P*(xR1a1) or R1b (Y-DNA) repopulated most of Europe shortly after the Last Glacial Maximum ... The European distribution of Y-chromosome Haplogroup I and various associated subclades has also been explained as resulting from male post-glacial re-co ...
Prehistory Of The Philippines - Stone-Age (c. 50,000 - C. 500 BC) - Genetic Studies - 2001 Stanford University Study
... University study conducted during 2001 revealed that Haplogroup O3-M122 (labeled as "Haplogroup L" in this study) is the most common Y-chromosome DNA haplogroup found among Filipinos ... This particular haplogroup is also predominant among Chinese, Koreans, and Vietnamese ... Another haplogroup, Haplogroup O1a-M119 (labeled as "Haplogroup H" in this study), is also found among Filipinos ...
Subclade (disambiguation)
... especially Subclade, a subgroup of a clade Subclade, a subgroup of a genetic haplogroup a subgroup of a human mitochondrial DNA haplogroup a subgroup of a human Y-chromosome DNA haplogroup ...
Haplogroup - Overlap Between Y-haplogroups and Mt-haplogroups
... The ranges of specific y-haplogroups and specific mt-haplogroups overlap, indicating populations that have a specific combination of a y-haplogroup ... the two genders combined with founder effect and genetic drift can alter the haplogroup composition of a population, so the overlaps are only rough ... The very rough overlaps between Y-DNA haplogroups and mtDNA haplogroups are as follows Y-DNA haplogroup(s) mtDNA haplogroup(s) Geographical area and/or peoples A L0 Eastern and ...