No.
Bellatrix stays evil.
Harry Potter is 16 at the start of the film, then he celebrates his birthday and turn seventeen...
a rat.
Harry Potter has always been a human, he just had powers that not every human had.
Hermione puts one of Bellatrix's hairs that fell onto her while at the Malfoy Manor into the Polyjuice potion. SPOILER: HARRY'S A WIZARD
Turn to page 394.
Turn the knob
He turned her into a Yak.
Nope. You can't turn into a wizard.You're born as a wizard.
Ron didn't turn into anyone. He simply put on a Death Eater's robes, and disguised himself as a Death Eater. No one would suspect that he was a blood traiter, and no one noticed that he was one of Harry Potter's best friends. I believe, if I'm not mistaken, that he went under the name "Dolohov" but that's mainly a guess.
No, he is controled by Voldemort.
Turn the computer off.............