Ta tree saase gientynagh oc: strooghyn gientynagh ta tessen-sheelraghey (heterothallaght), strooghyn ta ynsheelraghey (homothallaght), as shaghney sheelraghey (agamaght). Ta dooie agamagh tannaghtyn ny chillag haploidagh gyn covestey dys saigoat.