what is satellite dna in a genome?explain their role in dna finger printing?
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Satellite DNA is a 3-dimensional structure present in eukaryotic organisms. A tandemly repeating and non-coding DNA forms an array which is called Satellite DNA. Repetitions of short DNA produce higher frequency of neucleotides , adenine , guanine and thiamine thus forming a band called Satellite band. Minisatellites and microsatellites are its sub classifications. Minisatellite is also called VNTR ( variable number of tandem repeats ) and they are having high mutation and diversity rates. This variety of repetitions in minisatellties play an important role in DNA finger prinitng as it varies individual to individual.
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it has a high repetition of DNA with a high frequency of adenine and thymine. This base density is differ in different organisms. So this can be used in the finger printing
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