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Question : What is satellite DNA in a genome ? Explain their role in DNA fingerprinting . |
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Answer» SOLUTION :Satellite DNA refers to the bulk of the GENOMIC DNA , whose SEQUENCE do not code for proteins , but forms major peaks during density gradient centrifugation . It is of TWO types . (i) Microsatellite DNA (ii) Mini-satellite DNA The sequence of satellite DNA show high degree of polymorphism. Since DNA from every tissue of an individual shows the same degree of polymorphism , it forms the basis of DNA fingerprinting . Since the polymorphism is also inherited by children from the parents , it helps in paternity testing in dispute cases . |
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