nohandluke said:
Just because you're a clone doesn't mean you have the same voice. A clone of someone raised in another country will speak a different language with a different accent, thereby changing their vocal pattern, despite being an exact copy of a person on the other side of the world...

Case in point, Ewan McGregor in The Island. He plays two characters in that: a clone and the template. The clone has an American accent (and Ewan does a FANTASTIC American accent, for anyone who's seen this or Down with Love), and the template has Ewan's natural UK accent.

Sorry, but I had to respond to that. I think that this illustrates that accents are not hereditary fairly well.