DNA fingerprinting works because:
(a) Genes containing the same alleles make it simple to compare different individuals
(b) PCR allows amplification of proteins from single cells
(c) There are multiple alleles for some DNA sequences, making it possible to obtain unique patterns for each individual
(d) DNA in the skin cells is very diverse
DNA-fingerprinting is a technique of determining nucleotide sequences of areas of DNA which are unique to each individual. Each person has a unique DNA fingerprint. Only 0.1% of base pairs provide individuality to each person.