• the three ways genetic engineeering has worked
• Suppression: whatever characteristic it is, they are trying to modify it so that it doesnt show up as a disease
• Insertion: the most popular, and they introduce new genes into a cell and splice it together (They graft in new genetic info and hope it does what they want)
• Revision: this is the one with CRISPR where there is a targeted RNA, uses the cells own