Must be a copying mechanism for this genetic material. Watson and crick 1953 nature paper it has not escaped our notice that the specific pairing we have postulated immediately suggests a copying mechanism for genetic material . Proposed helical structure as well that the base-pairing in dna should allow for a mechanism genetic information in dna could be copied. Follow up 1954 paper by watson and crick, proposed a hypothesis for how. Dna consists of a pair of template chains that are complementary to each other, prior to replication hydrogen bonds are broken between strands allowing for unwinding and separation. Each strand being complementary means that they contain information necessary to reconstruct the other. When a cell copies dna, each strand serves as a template for the ordering of new nucleotides. When a dna double helix replicates, each of the two daughter dna molecules have one old strand from the parental molecule, and one newly made strand semiconservative model.