Sunday, June 13, 2010

More on Jewish genetics

MORE ON JEWISH GENETICS:
Genetic testing raises an age-old question — are the Jews a people, or a religion?


By MAYRAV SAAR
Last Updated: 5:15 AM, June 13, 2010
Posted: 12:15 AM, June 13, 2010
Comments: 0

We are home, Helen, thank you very much.

Two new genome studies of Jews worldwide prove that the Jewish people — long called the “People of the Book,” the “Chosen People” or, in unkind circles, “those people” — are, indeed, a people after all.

The first study, by researchers at New York’s Albert Einstein College of Medicine of Yeshiva University, found that Jews across the globe share distinct genetic traits that are different from other groups and that trace back to the ancient Middle East.

Researchers say the study, published in the American Journal of Human Genetics, puts to rest age-old questions about whether Jews are a group of unrelated people who share a religious ideology or a distinct ethnicity with common ancestry.

“The debate is over,” said Dr. Edward R. Burns, one of the lead authors of the study. “The Jewish people are one people with a common genetic thread that evolved in the second or third century BC.”

The study, “Abraham’s Children in the Genome Era,” compared the genetic analyses of 237 Jews, including Sephardic (Middle Eastern) and Ashkenazi (Eastern European) Jews — as well as an analysis of 418 non-Jews worldwide, and found that the Jews were more closely related to each other than to their fellow countrymen.

Past studies have reached similar conclusions, but they looked at smaller populations and considered only blood groups, mitochondrial DNA (a type of DNA passed down by mothers) or Y chromosomes (passed down by fathers).

For this inquiry, researchers conducted a genome-wide analysis of the major groups of the Jewish Diaspora — Ashkenazi Jews; Italian, Greek and Turkish Sephardic Jews; and Iranian, Iraqi and Syrian Jews.

The study — and a second genetic study published Friday in the journal Nature — scientifically undermines arguments made by those who challenge Jews’ historical relationship to Israel, such as former White House correspondent Helen Thomas, who resigned last week after saying Jews in Israel should “go home” to Germany, Poland and the United States.

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An interesting opinion piece on the historical and social (e.g., with reference to intermarriage) implications of the new studies.

Background here.