Toxin X is released only in mature spores of a single
fungus and only when both alleles at a single locus are
present. The toxin is never observed when the alleles are
together in hyphae or modified hyphae. What division is the
fungus found in?
You have been provided with a set of plates of fungi
isolated from a diseased leaf, one Chytridiomycota, one
Zygomycota, one Ascomycota and one Basidiomycota. The signs
of infection indicate that the disease has been caused by a
member of Ascomycota which does not form a sexual stage
easily. What features would you look for in your isolates
to indicate if the target fungus was present?