What is the worst case scenario of an mRNA being miscopied? what is the best case scenario?

The worst case scenario of an mRNA being miscopied will lead to mutation, which comes in certain types such as: silent mutation, substitution, and insertion or deletion. No matter what type, each comes with a profound effect to an organism’s cellular function (lesser in silent mutation). On the other hand, if there’s no error in mRNA coding, we could expect that amino acids (source of proteins) will be properly produced. Proteins will then be used for the different parts of the body.