Two haploid mycelia fuse

Eventually there are two haploid nuclei inside a hypha, resulting in a diploid zygote

The mycelium that grows following fertilization (part 1) has both haploid nuclei (un-fused) and is therefore

When a heterokaryotic mycelium

grows a special structure that will eventuallly produce spores (e.g. a

mushroom), this structure is called a

Spores blow in the wind, landing in new habitat. In those phyla with

fruiting bodies, the spores are released from inside the fruiting body.

A haploid spore develops into a haploid hypha and then a larger haploid mycelium

The diploid zygote produces haploid spores