A convert's biological parents are not their parents in a halachic sense. In some senses the converting beis din is "responsible" for the convert in the way of parents. In name, at least, the ger's ...
When a person goes to Shul to say Yizkor they obligate themselves to give Tzedaka in memory of the deceased. Can this obligation be paid from Maaser or does it have to be paid from the persons ...
Is a convert allowed to say Yizkor for their deceased parents if they are non-Jewish?
In all the Shuls (Synagogues) I've Davened in over the years, I noticed that all those whose parents are alive leave the shul during Yizkor. Why is this so?