Does the mother have to be tested?

I get this question every day. No, the mother does not have to be tested in order to determine paternity. There are however, some cases where testing the mother is helpful in the determination. Since the mother contributes half of her DNA to the child the remaining DNA must come from the father. It is helpful to know the mothers contribution when we are testing with grandparents because the alleged father is not available for testing or there are multiple alleged fathers and they are related. http://www.accugendna.com/dnafaq.html