... and Guanine (G) will only bond to Cystosine (C). For example, a strand of DNA looks like the following: A-A-C-T-G-A-T-A-G-G-T-C-T-A-G Then the DNA strand bound to it would look like: T-T-G-A-C-T-A-T-C-C-A-G-A-T-C Therefore together the section of DNA would be represented as follows: T-T-G-A-C-T-A-T-C-C-A-G-A-T-C A-A-C-T-G-A-T-A-G-G-T-C-T-A-G But the DNA strands are read in a particular direction, from the top (5' called the five prime end) to the bottom (3' called the three prime end). In a double helix the strands go opposite ways like the following: 5' T-T-G-A-C-T-A-T-C-C-A-G-A-T-C 3' 3' A-A-C-T-G-A-T-A-G-G-T-C-T-A-G 5' The Chemical structure of DNA: DNA double helix representation and a model structure of the Watson / Crick model What is DNA Fingerprinting? As said before the only aspect that differentiates from person to person are the order of their base pairs, but the chemical structure of everyone's DNA is the same as shown above. About the base pairs, well there are so many millions of base pairs in everyone's ...

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