I read a book around 2000 (the book looked fairly new, but might have been a new edition) that was about a young girl who wakes up on a space ship with memories of being on Earth years before. She discovers she has been cloned by her science teacher (think her skin is now blue) from a piece of her hair, and the science teacher's consciousness has been downloaded to the ship's computer, thereby controlling it.
It was a full novel, which I found in the library in the "Teen" section. It was in English, and I think the girl's flashbacks on Earth were set in America.
Any ideas what it could be called?