As I mentioned in my last update, ancestry, unacceptably, uses selection and confirmation bias. For Jews alone (myself included), I have read of others agonizing because their DNA shows up as not Jewish when it is clearly Jewish.  I myself had to use a calculator from another DNA website to get as close to the paper trail that I know as possible (See attached picture. My father is Jewish, and my mother is mostly gentile with some Ashkenazi and Sefardi Jewish heritage). I even read one case in which somebody contacted Ancestry, and he said that they said they would be “too controversial“ (his exact wording) to label some DNA as Jewish (my recollection is that they didn’t exactly say why it was “too controversial“, although it was implied why.). 

Ancestry’s deliberate confirmation and selection bias as well as their deliberately-unbalanced reference panels are unacceptable. By the way, not only Jewish people are affected. The 41-sample group that I mentioned in my last update, for example, is “Northern Asia”. How fair  to Northern Asians is having their DNA obscured just because Ancestry deliberately chose to not have enough samples? The minimum sample needed for each group in a research study like that is 400 to 1000 samples.