Introns and DNA profiles A2 Biology

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Leah.J
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Why are introns used in DNA profiling ?

Also , how do DNA profiles work, I don't get it
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Jpw1097
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(Original post by Leah.J)
Why are introns used in DNA profiling ?

Also , how do DNA profiles work, I don't get it
DNA profiling exploits the fact that there are regions within the DNA that contain repetitive sequences known as variable number tandem repeats (VNTRs), or more specifically, short tandem repeats (microsatellites). Microsatellites are repeats of 1-6 base pairs. The number of repeats is highly variable between individuals, and by comparing the number of repeats at multiple different loci, this further increases the diversity. Therefore, the likelihood of two indivuals having the same number of repeats across different microsatellite regions is extremely unlikely.

As for why introns are used, I'm not too sure. Perhaps this is where these microsatellites are typically found.
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