Lorna/Jean
I have to admit, when you first asked about the testing, I thought this might be what it was about. But when I realized that the DNA wasn't that of a father and daughter, I figured that I was just being silly.
For what it's worth, it changes nothing about who you are as a person.
It does make me wonder whose DNA you had, though. Clearly, Magneto has other children? A son and another daughter? Am I still being silly to assume that?