CRISPR-Cas9
CRISPR-Cas9 is an adaptation of the bacterial immune system that probably evolved from one of the types of mutations we’ve reviewed (point mutation, gene duplication, chromosome duplication, genome duplication, transposon, horizontal gene transfer).
Of these, one of these is most similar in effect to how CRISPR functions and probably an “ancestor” to CRISPR. Identify this mutation type and describe the similarity.