Your scan of Lucy's ADA gene showed a mutation in the active site. Why was this mutation not a problem?

it does not disturb the overall function of the active site

Explanation:

The gene mutation will not have an effect on the active site. This is because the mutation affects the non-essential amino acid or protein in the molecule. This causes the molecule to be in the same state and shape it was. In addition, the Quaternary protein structure has many proteins on the active site. Hence the mutation will not be significant and detrimental to the overall structure and function of the molecule.