A faithful adaptation would cause an uproar - chimpanzee slave with enhanced (but still subnormal) intelligence sings "Swanee River" to prove his humanity? And do I remember correctly that he calls humans "Boss"? Yeah, that couldn't possibly offend anybody.
I just read that Wikipedia entry. Funny how the writers kept the bit about lying for a cigarette but completely changed the point of it. In the original Jerry's lawyer offers Jerry a cig if he will lie about some trivial fact (how many fingers the lawyer is holding up, I think). Jerry refuses, demonstrating to the court that he knows that lying is wrong. Of course, Jerry was coached in advance and promised even more cigarettes if he played his part correctly!
The end of the story baffled me when I first read it, aged 14 or 15, probably. What did some song have to do with Jerry's humanity?