This hands-on activity allows you to create your own paper model of a DNA double helix. DNA has a ‘double helix’ structure. Much like a spiral staircase, it has two single strands that join and twist together. The ‘steps’ of the staircase are made up of the four bases of DNA (adenine, cytosine, guanine and thymine). These bind together in complementary pairs (A with T, C with G). Download the template from http://yourgenome.org/activities/origami-dna Credits: Origami model by Alex Bateman, based on Thoki Yenn's design