OOH! Cardifkiller made a good point.... Locke's mom always told him he was special... so maybe he really didn't have a dad thanks to Juliet's research? But Locke is A LOT older than Juliet... time travel? What am I saying, I don't know!!!

Also, Carl seems to be a young kid (Alex's age? to be her boyfriend) so are the others having children (2nd generation thing) or was Carl a Juliet-baby experiment, or was he recruited somehow like Juliet was?