It would be A because textbooks aren't updated for years so he will likely never find it there
I believe this is an example of frameshift mutation.
Frame shift mutation is a type of mutation that is caused by addition or deletion of a base pair or base pairs in the DNA of a gene resulting in the translation of the genetic code in an unnatural reading frame from the position the position of the mutation to the end of the gene.
The mechanism that is least likely to inactivate a tumor-suppressor gene is chemical modification.
Tumor suppressor genes, also abbreviated as TSG, are the ones that check the cell cycle and regulate them. They inhibit any damaged gene from moving ahead in the cell cycle. If the tumor suppressor genes are inactivated anyhow, it can lead to cancer.
Chemical modification is the process of chemically modifying the structure of a protein. It is a beneficial process when used efficiently as it help to derive the product of interest. Therefore this process is least likely to cause inactivation of tumor suppressor genes.
To know more about tumor suppressor genes, here
brainly.com/question/16188646
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Answer:
its going to be the 3rd one
Explanation:
