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Which of the following type of DNA sequences for the basis of DNA fingerprinting?(a) Satellite DNA(b) Minisatellite DNA(c) Microsatellite DNA(d) Tandem sequencesThis question was posed to me during a job interview.I'd like to ask this question from Genome Structure in chapter Nature of Genome of Cell Biology

Answer»

The correct choice is (B) Minisatellite DNA

The best explanation: Minisatellite DNA range from 10 to 100 base pairs in length and are found in clusters containing 3000 repeats. Because of unequal crossing over, these sequences are HIGHLY unstable and polymorphic. Because the minisatellite DNA can vary from person to person, it forms the basis of technique used for criminal or PATERNITY cases, DNA fingerprinting.



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