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Haplogroup J is a human mitochondrial DNA (mtDNA) haplogroup. The clade derives from the haplogroup JT , which also gave rise to haplogroup T . Within the field of medical genetics , certain polymorphisms specific to haplogroup J have been associated with Leber's hereditary optic neuropathy .
In human genetics, Haplogroup J-M172 or J2 [Phylogenetics 1] is a Y-chromosome haplogroup which is a subclade (branch) of haplogroup J-M304. [ Phylogenetics 2 ] Haplogroup J-M172 is common in modern populations in Western Asia , Central Asia , South Asia , Southern Europe , Northwestern Iran and North Africa .
Joy Ibsen's mtDNA was tested and belongs to mtDNA haplogroup J1c2c. [ 43 ] [ 44 ] Joy Ibsen died in 2008. On 4 February 2013, University of Leicester researchers announced that there was an mtDNA match between that of a skeleton exhumed in Leicester suspected of belonging to Richard III and that of Joy Ibsen's son, Michael Ibsen, and a second ...
A haplotype is a group of alleles in an organism that are inherited together from a single parent, [1] [2] and a haplogroup (haploid from the Greek: ἁπλοῦς, haploûs, "onefold, simple" and English: group) is a group of similar haplotypes that share a common ancestor with a single-nucleotide polymorphism mutation. [3]
Haplogroup J2 has been present in South Asia mostly as J2a-M410 and J2b-M102, since neolithic times (9500 YBP). [54] [55] J2 clades attain peak frequencies in the North-West and South India [54] and is found at 19% within South Indian castes, 11% in North Indian castes and 12% in Pakistan. [38]
A 2006 study by Behar et al., [107] based on high-resolution analysis of Haplogroup K (mtDNA), suggested that about 40% of the current Ashkenazi population is descended matrilineally from just four women, or "founder lineages", likely of mixed European and Middle Eastern origin. They concluded that these founder lineages may have originated in ...
Haplogroup J-M267, also commonly known as Haplogroup J1, is a subclade (branch) of Y-DNA haplogroup J-P209 (commonly known as haplogroup J) along with its sibling clade haplogroup J-M172 (commonly known as haplogroup J2). (All these haplogroups have had other historical names listed below. [Phylogenetics 1] [Phylogenetics 2])
Haplogroup J-M304, also known as J, [Phylogenetics 1] is a human Y-chromosome DNA haplogroup.It is believed to have evolved in Western Asia. [2] The clade spread from there during the Neolithic, primarily into North Africa, the Horn of Africa, the Socotra Archipelago, the Caucasus, Europe, Anatolia, Central Asia, South Asia, and Southeast Asia.