Satellite DNA – The repetitive DNA are separated from bulk genomic DNA as different peaks during density gradient centrifugation. The bulk DNA forms a major peak and the other small peaks are referred to as satellite DNA. These generally do not code for any proteins.
Significance of satellite DNA in DNA fingerprinting –
• These are inherited from parents to offsprings. They can be used for paternity testing.
• They show high degree of polymorphism which forms the basis of DNA fingerprinting.
• Different tissues in the body show the same degree of polymorphism and thus are used as an identification tool in the forensic science.
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