Ashkenazi are Europhile Jews, Fake Jews. There is no Jewish genotype to identify. Jews are a ethnoreligious group.The Falashas and the Kochinim are the only non-ethnic Jews claiming to be Jews. The rest of them are all +40% Levantine from Biblical Israel.
the dna percent docent matter much in such a scenario because a jewish lady could have been stranded in Somalia 1000 years ago and her daughter married a Somali and so on until the chain got to your mom who dna wise might be less than 1 percent jewish but lineage wise qualifies