Answer:
The correct answer is - one.
Step-by-step explanation:
A triplet code or triplet grouping of the genetic message is a code that carries the genetic information and help in providing the enough information in the DNA to arrangement of all 20 amino acid. It can make 64 cobinations of genetic code by just triplet code.
Adding or subtracting the one nucleotide of the triplet code would change the genetic code or message and cause mutation or leads to different amino acid and protein.
Thus, the correct answer is- one.