What is the cause and effect relationship between the genetic code and gene expression?

Genetic expression. The genetic code codes for proteins. The information of the DNA is 'translated' into a chain of amino acids that forms a protein ... The mutation that causes phenylketonuria disrupts the ability of the body to break down the amino acid phenylalanine.

The genetic code provides the information for the genetic information. The genetic code is the 3 letter code which has information in coded form.

The gene expression can be defined as the process by which the the coded form of data is decoded and using the information synthesis of protein takes place.

These functional proteins in the body decides the character of the person. The relation is simple the genetic code is the source of gene expression.