It has been suggested that MHC plays a role in the selection of potential mates, via olfaction. MHC genes make molecules that enable the immune system to recognise invaders; generally, the more diverse the MHC genes of the parents, the stronger the immune system of the offspring.
It has been proposed that MHC participates in the selection of potential partners, through smell. MHC genes produce molecules that allow the immune system to identify invaders; typically, the more varied the MHC genes of the parents, the stronger the immune system of the offspring.