Matching DNA sequence of criminal with suspect is known as
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DNA finger printing
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DNA amplification
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Gene mapping
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DNA resolution
Reveal answer
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A
Correct answer
Explanation
DNA amplification is the synthesis of multiple copies of small DNA sample which is done by PCR technique. It amplifies the gene of interest in three steps namely denaturation of target DNA (thermal cycle to separate the DNA strands), annealing of primers to the ssDNA and polymerization (extension of primer into complete DNA strand complementary to the template strand).
Gene mapping is identifying the location of different genes on a chromosome. It is done using recombination frequency (which does not correspond to physical distance) or using RFLPs that generate physical maps.
The DNA polymorphism in simple-sequence DNA and VNTRs has revealed during DNA finger printing in the identification of suspect since it is very remote possibility to have two individuals same repeats of satellite DNA throughout the genome except they share a biological relationship. This is because a child gets half DNA from father and half from the mother. Restriction enzymes of genome produce the restriction fragments length polymorphisms, or RFLPs depending on the location of restriction sites which are then sorted by gel electrophoresis followed by southern blotting. The blots of the suspect and of the sample from the crime scene are compared for sequence homology using radioactive probes; option A is the correct answer.