>>4
If I remember this movie (and I don't!), the lock of hair was taken from the ends. This would contain only mitochondrial DNA. With what they were given (hair), one would be able to determine with a high degree of accuracy some very useless genetic information common to the bulk of the population with only weak indicators as to its subset (i.e.: this individual might be Chinese). In order to pin down the unique attributes of an individual and reconstruct it properly (sans memories/personality of course), you'd need nuclear DNA from proper tissue. So remember, when you're a robot child doppleganger, take that lock of hair by ripping it out of the skull. Try to get some skin and blood too!
Anyway, this movie is (trying to be) a philosophical piece and you (and I) are being fascetious but the answer to your questions is still no!