onverted to Judaism at various times

onverted to Judaism at various timesThat is the conclusion of two new genetic surveys, the firstyueduoto use genome-wide scanningHydraulic Hosedevices to compare many Jewish communities around the world.

A major surprise from both surveys is the genetic closeness of the two Jewish communities of Europe, the Ashkenazim and the Sephardim. The Ashkenazim thrived in Northern and Eastern Europe until their devastation by the Hitler regime, and now live mostly in the United States and Israel. The Sephardim were exiled from Spain in 1492 and from Portugal in 1497 and moved to the Ottoman Empire, North Africa and the Netherlands.

The two genome surveys extend earlier studies based just on the Y chromosome, the genetic element carried by all men. They refute the suggestion made last year by the historian Shlomo Sand in his book “The Invention of the Jewish People” that Jews have no common origin but are a miscellany of people in Europe and Central Asia who convertedHydraulic Hoseto Judaism at various times.

Jewish communities from Europe, the Middle East and the Caucasus all have substantial genetic ancestry that traces back to the Levant; Ethiopian Jews and two Judaic communities in India are genetically much closer to their host populations.

The surveys provide rich data about genetic ancestry that is of great interest to historians. “I’m constantly impressed by the manner in which the geneticists keep moving ahead with new projects and illuminating what we know of history,” said Lawrence H. Schiffman, a professor of Judaic studies at New York University.

One of the surveys was conducted by Gil Atzmon of the Albert Einstein College of Medicine and Harry Ostrer of New York University and appears in the current American Journal of Human Genetics. The other, led by Doron M. Behar of the Rambam Health Care Campus in Haifa and Richard Villems of the University of Tartuyueduoin Estonia,Hydraulic Hoseis published in Thursday’s edition of Nature.