Yeah I know, new guy thread. Sorry.
Anyway, think about this:
As its explained, there is an “accident” in the development of the 7th Cylon in the embryonic stage that caused the model to be scrapped and the apparent death of the prototype.
But what if this accident is as simple as a “Y” chromosome defaulting to “X”?
My only evidence: that in the original series Starbuck was a guy, her seemingly inherent artistic streak, the whole dance around weather or not Kara was/is the 7th smacks of Red Haring and the fact that the Cylon/Cavil’s plan seems to be “Frack Everyone!” I can see him going to extraordinary lengths to mess over an artistic younger “brother.”