Genetic 342 A&B Kenneth G Wilson Professory of Botany

A purine must pair with a pyrimidine or vice versa

Adening Pairs with Thymine/Cytosine with Guanine - Chargaffs Rule

A mechanism for cell reproduction:

It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material. Watson, JD and FHC Crick. 1953. Molecular structure of nucleic acids: A structure for deoxyribose nucleic acid. Nature 171:737 - 38.

It did not give us any idea (insight) into how this information resulted in a cell

This is our friend Oliver the parrotlet, Oliver is a true parrot, the smallest in the world.