Mary shelley's frankenstein?

my girlfriend needs to do a report on mary shelleys frankenstein and we have to read the book and watch the movie. i have never seen the movie, but i have seen the movie Young Frankenstein, which was based on mary shelleys characters. i was just curious to know if young frankenstein is basically the same story as frankenstein? i know it is based on his grandson, but is the storyline the same? my girlfriend is afraid of horror movies, and if young frankenstein is the same story, we would rather watch a comedy/musical to help relate to the book. can anyone help me out?