Respuesta :
Answer:
Option). duplication.
Explanation:
Mutations are permanent changes in DNA, due to change in its nucleotide sequence. A mutation that occurs due to replication or duplication of a portion of genetic material is known as duplication. Â
As altered sequence in given bacterium represents duplication of three guanine nucleotides, the type of mutation that caused this sequence change is duplication.
Original sequence: actgggatcct
Altered sequence: Â atcggggggatcct
Thus, the correct answer is 'duplication.'