Kaye Marvins PhotograpyThea Singer (left) and her sister Vera BlumDNA technology has helped to identify 9/11 victims, find missing persons and determine paternity. But can it really reunite victims of the Holocaust?Thea Singer has decided it's worth a try.Singer has done just about everything else to reconnect with the friends and family she lost during the Holocaust. (The Hebrew word is haShoah; today Houston is observing Yom HaShoah, tomorrow's international Holocaust Remembrance Day.) Born in