... . Located in the nucleus of every cell in the body, DNA holds the basis of individuality, making the blueprint of a convicting genetic fingerprint (Froelich and Leyden 3). It consists of four chemical substances-- adenine, cytosine, thymine, and guanine (Browning 1). Adenine joins only to thymine to form one pair of bases. Cytosine joins only to guanine to make another pair. These four bases ... fingerprint, one expert commented, "They look like nothing so much as ink spots, but these marks are more than that: they are a genetic portrait, an immutable chemical signature" (Cheney 1). One ...

• Word Count: 1919
• Approx Pages: 8
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• Grade Level: High School