bkp_duke
Well-Known Member
When you insert a genetic sequence it leaves a fingerprint due to having insertion sequences at both ends and the one you want inserted in the middle,
a "fingerprint" so to speak of "Hey, here's a marker next to an inserted set! look at me!"
No longer true. There are "restriction enzyme sites" (as they are called) which cannot be distinguished from normal sequences in the native genome.
Without evidence to support or refute, BOTH theories of origin have equal plausibility, politics aside.
EDIT - and using newer gene editing technologies, you can make genome edits with zero restriction enzyme sites.