A codon is a set of 3 nucleotides which code for an amino acid. There are a few special codons which represent stop and start too.
Codons are three consecutive nucleotides of DNA in an exon. The genetic code is the mapping between codons and amino-acids. There are 64 possible codons, and 20 possible amino-acids so this is not a...
It has four letters. G, C, A, and T.
3 i think
It codes how to make proteins to make you, you! ( i think lol)