The genetic code is a term used to describe the sequences of the genome. More specifically, the code whereby specific amino acids represented in the form of three sequential DNA bases. The genetic code is universal and is the strongest evidence that all living things share a common evolutionary heritage. The letters A, G, T and, C (letters are called a set of triplets) correspond to the nucleotides found in DNA. Organised into something called Codons.
The collection of codons is the Genetic Code. Each amino acids (20) there should be 20 codons altogether. Each codon should have 3 nucleotides to impart specifically. A Condon cannot be shared by more than one Amino acid, nature’s way to minimize the risk of errors in mutations