How DNA codes for Proteins

What is  a gene

A gene is a length of DNA which means it is a sequence of DNA bases that codes for a polypeptide. Each gene occupies a specific Loci on a chromesome. 

The Genetic code

The sequence of nucliotide bases on a gene provides a code with instruction for the construction of a polypeptide. The genetic code as a number of charateristics: 

• It is a triplet code. A sequence of three nuceotide bases codes for an amino acid. 
• It is a degenerate code. All amino acids ber form one or two have more than one code. Some codes dont correspond to an amino acid but…