A codon is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis. ... The genetic code includes 64 possible permutations, or combinations, of three-letter nucleotide sequences that can be made from the four nucleotides.

Do codons consist of three nucleotides?

This sequence is broken into a series of three-nucleotide units known as codons (Figure 1). The three-letter nature of codons means that the four nucleotides found in mRNA — A, U, G, and C — can produce a total of 64 different combinations. ... (Note, however, that each codon represents only one amino acid or stop codon.)

How many nucleotides compose a codon?

three nucleotides—called a triplet or codon—codes for one particular amino acid in the protein.