Haplogroup J (mtDNA)

Haplogroup J bearers along with persons carrying the T mtDNA clade settled in Europe from the Near East during the late Paleolithic and Mesolithic.

However, any statements concerning the geographic origin of this or any other haplogroup are highly speculative and considered by most population geneticists to be 'story telling' and outside the domain of science.

[8] Within Europe, >2% frequency distribution of mtDNA J is as follows:[11] Haplogroup J has also been found among ancient Egyptian mummies excavated at the Abusir el-Meleq archaeological site in Middle Egypt, which date from the Pre-Ptolemaic/late New Kingdom, Ptolemaic, and Roman periods.

[13] Haplogroup J has been observed in ancient Guanche fossils excavated in Gran Canaria and Tenerife on the Canary Islands, which have been radiocarbon-dated to between the 7th and 11th centuries CE.

One instance of haplogroup J1c10a1 has been observed in the Human Genome Diversity Project's sample of ten Oroqen individuals from northernmost China.

that the uncoupling of oxidative phosphorylation related to SNPs which define mt-haplogroup J consequently produces higher body heat in the phenotype of mtDNA J individuals.

[18] Individuals from haplogroups UK, J1c and J2 were found to be more susceptible to Leber's hereditary optic neuropathy because they have reduced oxidative phosphorylation capacity, which results in part from lower mtDNA levels.

[20] The T150C mutation, which is exclusive to but not definitive of, the J2 subclade of Haplogroup J may be part of a likely nuclearly controlled general machinery regarding the remodeling & replication of mtDNA.