I found a paper on genetical modification of mosquitos disrupting malaria. There is an intresting excerpt conserning proliferation of a desired gene into whole population:
All gametes arising from such an event will pass on the [Cas9-gRNA] cassette to their progeny, just as with naturally occurring HEGs (Figure 1B). In both mosquito studies, the crossing of a heterozygous MCR-carrier to a wild-type individual resulted in transmission of the allele to over 90% of the progeny, demonstrating strong genetic drive compared to the 50% inheritance predicted by Mendelian genetics.
It made me wonder if that is a one-of-a-kind situation or it is possible to change the whole population of any species by introduction of a few modified specimens and then just wait. Some ideas if it is possible:
- A nefarious scientist inserts the morphine gene from poppy into a common garden weed, disperses several kilos of seeds from his biplane, then cackles of drug epidemics 5 years later.
- The fact that all suspects have large families catches the eye of a detective. It turns out that they are members of a secret eugenics society that wants to disseminate certain beneficial genes despite harsh ban on human modification.