DNA fingerprinting is the technique used in
solving the paternity dispute for a child. DNAfinger printing is a technique of
determining nucleotide sequences of certain areas of DNA which are unique to
each individual. The basis of DNA fingerprinting is DNA polymorphism. Although
the DNA from different individuals is more alike than different, there are many
regions of the human chromosomes that exhibit a great deal of diversity. Such
variable sequences are termed 'polymorphic'(meaning many forms).
A special type of polymorphism, called
VNTR (Variable Number of Tandem Repeats), is composed of repeated copies of a
DNA sequence that lie adjacent to one another on the chromosome. Since,
polymorphism is the basis of genetic mapping of human.
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