Key concepts Biology Life DNA Double helix Introduction Ever wondered how DNA, the genetic blueprint of a life-form, can encode and pass on the information on how to grow and maintain that life ...

They’re models. We know that DNA exists in this double helix because it’s the only shape that can explain the X-ray diffraction patterns it forms.

Chances are you've seen an illustration of DNA's double-helix structure and even pictures of the chromosomes that make up the human genome. But where and how does the famous double helix fit into ...