A codon is the nucleotide triplet that codes for an amino acid. A codon is a group of 3 nucleotides that codes for one amino acid. There are 64 combinations of nucleotides i.e. 64 codons, out of which 61 codes for amino acids and 3 are stop codons, and only 20 amino acids, the code is said to be degenerate or redundant. This means that there is more than one codon that code for a single amino acid.

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Chapter 2, Problem 26E

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A codon is the nucleotide triplet that codes for an amino acid. A codon is a group of 3 nucleotides that codes for one amino acid. There are 64 combinations of nucleotides i.e. 64 codons, out of which 61 codes for amino acids and 3 are stop codons, and only 20 amino acids, the code is said to be degenerate or redundant. This means that there is more than one codon that code for a single amino acid.

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