[MacDorcha]

At the molecular level? Do you mean the chemical level?

DNA doesn’t change from it’s basic coding, if that’s what you’re asking.

The DNA that makes a strain of bacteria into that strain remains. (that is, unless you expose the organism to a chemical like alcohol).

[js1138]

DNA doesn’t change from it’s basic coding, if that’s what you’re asking.

Be more specific. What kind of change to the genome is required by evolution, but has not been observed?

Here, for example, are a few of the known kinds of changes to DNA.

1. Missense
2. Nonsense
3. Insertion
4. Deletion
5. Duplication
6. Frameshift
7. Repeat expansion

When you say DNA can't change it's basic coding, what do you mean, specifically?