What generation begins to develop when spores germinate?

When spores germinate, they give rise to the gametophyte generation in plants that undergo alternation of generations, such as ferns and mosses. The gametophyte is typically haploid, meaning it contains a single set of chromosomes. This generation produces gametes (sperm and eggs) through mitosis, which then fuse to form a diploid zygote, leading to the development of the sporophyte generation.