Explain the significance of satellite DNA in DNA fingerprinting technique.
Significance of satellite DNA in DNA fingerprinting:
(i) Satellite DNA do not code for any proteins but they form a large portion of human genome. These sequences show high degree of polymorphism and form the basis of DNA fingerprinting.
(ii) Since DNA from every tissue (such as blood, hair follicle, skin, bone, saliva, sperm, etc.) from an individual show the same degree of polymorphism, they become very useful identification tools in forensic applications.
(iii) These polymorphisms are transferred from parents to children so DNA fingerprinting is the basis of paternity testing in case of disputes.