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Genes Chromosomes

The DNA molecule is a long double helix, resembling a spiral staircase. The links in this chain, which determines the genetic code of each individual, consisting of pairs of four types of molecules called bases (adenine, thymine, guanine and cytosine). Adenine pairs with thymine and guanine with cytosine. The genetic code is written in triplets, so that each group of three links of the chain codes for the production of one of the amino acids, which are the components that constitute the protein.