KenzS said:
Bicentennial Man anyone?
Android's are meant to look like a human. I suppose if you gave it a human brain it would be human. The brain contains the most of our characteristics, I doubt it could be replicated.
That's debatable. There's evidence to suggest that out characteristics, consciousness and instincts aren't contained in the brain at all, but in the cerebral spinal fluid (and possibly other organs too).
There have been cases of people born without any brain matter, or who's brains have been reduced by fluid (hydrocephalus).
There's even a famous case of a university student with a 126 IQ and 1st class degree in mathematics, who only had 4mm of brain matter.
http://en.wikipedia.org/wiki/John_Lorber
http://www.flatrock.org.nz/topics/science/is_the_brain_really_necessary.htm
So I don't think simple putting a brain into an android will make it human.
I think there's more to being human than simply having a brain, and despite being 'biological machines', I don't believe that our consciousness (or soul, if you like) can be replicated easily.
Even if every part of our biological form could be recreated artificially, I think our consciousness would remain the elusive, missing piece of the puzzle.