Click on the nucleotides in the DNA sequence or use the buttons below to explore how small changes to DNA codes can have a BIG effect on the protein that's produced!
Adenine (A)
Thymine (T)
Cytosine (C)
Guanine (G)
Gene Sequence (remember that this will "match" the codon within the mRNA (with Ts being replaced by Us), as mRNA is synthesised via complementary base pairing with the template strand of a gene's DNA!