In the two-minute clip from the premiere of Lost, in which we learn that Kate still keeps pictures of her ex-fiance prominently displayed in her home, our heroine must act fast when her blood and Aaron's are requested by some lawyers. Set aside the fact that the firm's name (Agostini and Norton) feels like it should anagram into something and you're still left with something pretty problematic for Kate and her pretend son.
And then I wondered--
Why can't she get Jack's? As he so politely alluded to in "Something Nice Back Home," Jack, unlike Kate, is blood-related to Aaron.
In Athena Alexandria's lovely new spec!fic, "Sanctuary," she posits that the leukocytes (white blood cells) would show that Kate's blood was inherently "male," and therefore, um, not hers.
I don't know if she researched this. Wikipedia's page on DNA testing didn't address this specific issue (which is surprising, since I'm sure it's SO common), but it stands to reason that if you look at a person's chromosomes, there's going to be an XX or XY situation going on there.
Okay, that makes sense to me.
But then how could you get a blood transfusion? They don't have to make sure that you get "female" blood if you're female or "male" blood if you're male, right? Does your body turn that blood into blood with your DNA on it somehow? Or is it just assumed that the ratio of transfused blood to own personal blood is such that it would never really be a problem? Or could you hypothetically have a blood transfusion when you're five, be involved in a custody battle when you're thirty, and be disproven as your kid's dad because they happened to grab a white blood cell that belongs to someone else and has been zooming through your circulatory system for the last twenty-five years?
::Screams in frustration.::
In any case, I really like the speculation over in the comment section on a recent Dark post that Kate shows up wherever she shows up at (Sun's? Cassidy's?) to drop off Aaron for a little while, then goes to meet Jack. It's really hard to go on A-Missions and raise a kid at the same time. It would also explain why we've seen filming reports that involve Jack and Kate--and not Aaron.
Dana Scully looks at me and says, "I told you so."