NATS 1575 Study Guide - Final Guide: Microsatellite, Petrographic Microscope, Tandem Repeat
1 Feb 2018
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Document Summary
Four types of bases are associated with the dna structure. The bases on each strand are properly aligned in a double-helix configuration, which is two strands of dna coiled together. As a result, adenine pairs with thymine and guanine pairs with cytosine. This concept is known as base pairing. The order of the bases is what distinguishes different dna strands: short tandem repeats (str) Latest method of dna typing, short tandem repeat analysis (str) most successful and widely used dna profiling procedure. Str"s are locations on the chromosomes that contain short sequence that repeat themselves within the dna molecule. They serve as useful markers for identification because they are found in great abundance throughout the human genome. Consist of repeating sequences of 3 to 7 bases in length, and the entire strand of an str is also very short, less than 450 bases in length.
