I also didn't get the impression that RE6 was about cloning. If it was, then why did Simmons need so many test subjects until he got the "perfect" Ada? He obviously knew how to brainwash people, so I guess his only problem was that the other women didn't
look enough like Ada after the transformation was complete (which wouldn't be an issue if this was really about
cloning in the true sense of the word).
It is also mentioned somewhere that Carla was "a close match", and if you look at the picture that shows her with Simmons before the transformation, you'll see (or at least it looks like that to me) that her face actually
is similar to Ada's. So I suppose the C-virus can't clone people, it can only transform them to look as much as possible like another person, whereas when you clone someone in modern fiction, the clone is usually an entirely new being that is
born at the moment you create it, not a person that has lived before, but was changed. (Long and complicated sentence, I hope people will understand what I'm trying to say.)
As for the hand, I would be careful with statements like "It looks like a male hand". RE isn't especially good at that...

I mean, look at Piers's hands. They are big, but lacking hair and visible veins, and they look quite female to me even though he's a man.