0 a process in which genes for proteins that react to light are added to cells, other proteins, etc. in order to study and control those cells or proteins :
Optogenetics is a technology that allows you to turn specific neurons on and off in the brain by genetic targeting.
Using optogenetics, the scientists then briefly disabled a part of the brain as rats approached the crossroad.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.