These strategies are homothallism for self-fertile fungi and heterothallism for self-incompatible, outcrossing fungi.
2.
Homothallism is thus a form of sex that is unlikely to be adaptively maintained by a benefit related to producing variability.
3.
They contain the ability to self-fertilize ( homothallism ) or more commonly require hyphae from two individuals of different mating types to make contact and fertilize ( heterothallism ).