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NEET2012ZoologyMolecular Basis of InheritanceActual

What is it that forms the basis of DNA fingerprinting?

Options

  1. AThe relative proportions of purines and pyrimidines in DNA
  2. BThe relative difference in the DNA occurrence in blood, skin and saliva
  3. CThe relative amount of DNA in the ridges and grooves of the fingerprints
  4. DSatellite DNA occurring as highly repeated short DNA segments

Correct answer

D. Satellite DNA occurring as highly repeated short DNA segments

Step-by-step solution

DNA fingerprint is individual specific DNA identification which is made possible by the finding that no two people are likely to have the same number of copies of repetitive DNA sequences of regions. The chromosomes of every human cells contain short, highly repeated DNA sequence (15 nucleotide) called minisatellite scatterd throughout.

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