Four nucleotides Click to see full answer. Then, how many nucleotides are present in the normal DNA sequence?Each codon consists of three nucleotides, usually representing a single amino acid.Also Know, how many nucleotides are required for 20 amino acids? The nucleotide triplet that encodes an amino acid is called a codon. Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids, the code is degenerate (more than one codon per amino acid, in most cases). In this regard, how many nucleotides are present in the normal DNA sequence in Model 1 Pogil answers? FOUR How many codons are in a gene? 64