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A 2009 study by Goldstein et al. shows that it is possible to predict full Ashkenazi Jewish ancestry with 100% sensitivity and 100% specificity, although the exact dividing line between a Jewish and non-Jewish cluster will vary across sample sets which in practice would reduce the accuracy of the prediction.
Efforts to identify the origins of Ashkenazi Jews through DNA analysis began in the 1990s. There are three types of genetic origin testing, autosomal DNA (atDNA), mitochondrial DNA (mtDNA), and Y-chromosomal DNA . Autosomal DNA is a mixture from an individual's entire ancestry.
This page is subject to the extended confirmed restriction related to the Arab-Israeli conflict. Khazar Khaganate, 650–850 The Khazar hypothesis of Ashkenazi ancestry, often called the Khazar myth by its critics, is a largely abandoned historical hypothesis that postulated that Ashkenazi Jews were primarily, or to a large extent, descended from Khazar converts to Judaism. The Khazars were a ...
DNA from human remains found in a medieval well suggests they belonged to Ashkenazi Jews who fell victim to antisemitic violence during the 12th century.
The mutation might then have been "reintroduced by recurrent gene flow from Ashkenazi populations to other Jewish, European, and North African populations. The present-day frequency of the mutation in control populations (0.05% in Europeans, 0.5% in North-African Arabs and 1% in Ashkenazi Jews) may support this scenario".) [43] [44]
10% of Europeans fall under the K haplogroup. It is hypothesized that the subclade represents one of four major founding maternal lineages ("founding mothers") of Ashkenazi Jews which together account for 45% of all Ashkenazi mtDNA haplotypes. Approximately 19% of Ashkenazi Jews with ancestry from Poland are in mtDNA haplogroup K1a1b1a. [2]