Answer:
DNA polymorphism refers to the variation in
DNA arising through mutation at non-coding sequences.
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 genome ,therefore, it
forms the basis of DNA fingerprinting too.
The single nucleotide
polymorphisms are used in locating diseases and tracing of human history as
well as in case of paternity testing.
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