Winter 2006 • Vol. XXVIII No. 1 Writing in Code: Literature and the GenomeJanuary 1, 2006 |

Base Pairs

The genetic information in all living things is stored in DNA which is present in chromosomes. Adenine, thymine, guanine, and cytosine (A, T, G, and C) molecules make up the DNA. They contain coded information that is required to construct a living organism and to direct the way it functions. The sequences of these four bases, A, T, G, and C, determine how you differ from other individuals and from other living things. The bases are paired, A with T, and G with C. We often use the term "base pairs, " since the presence of the base A presupposes the presence of a T on the other side of the DNA molecule.          —National Fragile X Foundation Web site, www.fragilex.org   —Where art thou gone my own dear child? What wicked looks are those I see? Alas! Alas! that look so wild, It never, never came from me: If thou art mad, my pretty lad, Then I must be for ever sad.           —William Wordsworth, "The Mad Mother" I've set up my

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