I first wrote about AncestryDNA-One Jewish Result over a year ago. At that time, the autosomal results for my husband indicated that his genetic ethnicity (going back many hundreds of years) was 82% European Jewish, 13% British Isles (which didn't make sense to us), and 5% Uncertain.
The updated results show an increased number of genetic regions and provide more information about the possible ranges of ethnicity. The updated summary page is below, showing an approximate amount of European Jewish ancestry of 92%.
|My husband's updated genetic ethnicity (according to AncestryDNA)|
Okay, this makes more sense - 92% European Jewish with some trace regions... let's look at these results more closely:
|Specific ethnicity results for European Jewish from AncestryDNA|
The links in this information box provide additional information about how AncestryDNA came up with the percentage and range for each ethnicity. The link after "Surprised by your ethnicity estimate?" includes a good explanation of the reasons for variations, which include: the genetic influence of neighboring regions, the estimate is on the edges of our predicted range, the random nature of genetic inheritance (with a nice graphic representation showing how genes can pass quite differently from parents to multiple children), and the fact that ethnicity estimation is still an open problem.
Trace Regions is an interesting addition to the AncestryDNA results. (I like this better than "Uncertain" as a result.)