First, you obviously don't have to be male to have this test. You simply need to test a male member of your family as you have done in the case that you are not male. Second, all this means is that on that paternal line of your family, your furthest paternal male ancestor is of European descent, or white. This is extremely common because of all the continuous rape of female slaves by random masters, overseer bosses, white hired help, etc. (And sometimes an actual love relationship). It is very common for African Americans to have European YDNA and somewhat less common, though it happens, for them to have European MTDNA, though usually those families are from the North where white female indentured servants were in daily contact with black slaves and both were on an almost equally low level of the societal totem pole. If you're interested in finding your African DNA,then I suggest testing for your MTDNA which is your mother's, mother's, mother's, etc. DNA. Also, you can try to trace her father's if she has a brother, your maternal grandfather is still alive, or other direct male relative with whom you would share that line with. The same can be done with your father's mother's MTDNA. If your father has a sister, or your maternal grandmother is still alive, you may trace this as well! Good luck with your findings!