DNA typing and Jewish populations

Advanced hereditary examination, including Y-DNA and mtDNA haplotyping, of contemporary Jewish communities around the world, has helped to decide which of the communities are possible to have settled from the Israelites and which are not, as easily as to build the degrees of linkage between the groups.
Important studies archived here include the University College London survey of 2002, Ariella Oppenheim's survey of 2001, Ariella Oppenheim's survey of 2000, Michael Hammer's survey of 2000, and others. Key findings:
# The principal cultural factor of Ashkenazim (German and Eastern European Jews), Sephardim (Spanish and Portuguese Jews), Mizrakhim (Middle Eastern Jews), Juhurim (Mountain Jews of the Caucasus), Italqim (Italian Jews), and almost new contemporary Jewish populations of the reality is Israelite. The Israelite haplotypes slip into Y-DNA haplogroups J and E.
# Ashkenazim too settle, in a smaller manner, from European peoples such as Slavs and Khazars. The non-Israelite Y-DNA haplogroups include Q (typically Central Asian) and R1a1 (typically Eastern European).
# Dutch Jews from the Netherlands too settle from western Europeans.
# Sephardim too settle, in a smaller manner, from respective non-Israelite peoples.
# Georgian Jews (Gruzinim) are a mixture of Georgians and Israelites.
# Yemenite Jews (Temanim) are a mixture of Yemenite Arabs and Israelites.
# Moroccan Jews, Algerian Jews, and Tunisian Jews are mainly Israelites.
# Jews from the region of Libya are generally Berbers.
# Ethiopian Jews are nearly solely Ethiopian, with less or no Israelite descent.
# Arabs from Palestine are likely partially Israelite.