The blueprint of organisms: DNA
The phenomena such that parents and children are resemble and the injured part is repaired with the same type of cells are caused by the genetic information with the blueprint of organisms is passed from parents to children. Each cell stores its genetic information as the DNA (deoxyribonucleic acid) molecule. They are composed of two chains and wind around each other.
This is a papermodel of one round of DNA double strand. Note that it rounds ten bases for each round and there are two types of grooves, big groove (major groove) and small groove (minor groove).
PDB 1bna: The information page of this structure (Yorodumi)
The tutorial movie in English is also available.