NATS 1575 Lecture Notes - Lecture 9: Colin Pitchfork, Tandem Repeat, Genetic Testing
3 Mar 2017
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Document Summary
Portions of the dna molecule contain sequences of bases that are repeated numerous times, known as tandem repeats. A sequence of 15 that are the same bases. A sequence of 5-11 bases that are repeated many times. To a forensic scientist, these tandem repeats offer a means of distinguishing one individual from another through dna typing. Tandem repeats seem to act as filler or spacers between the coding regions of. What is important to understand is that all humans have the same type of repeats, but there is tremendous variation in the number of repeats each of us have. We have the same type of repeats but there is variation in the number of repeats that each of us have. A-t-t twice and another person may have a-t-t six times. Length differences associated with relatively long repeating dna strands are called restriction fragment length polymorphisms (rflp) and form the basis for one of the first dna typing procedures.
