Spores are usually haploid and unicellular and are produced by meiosis in the sporangium of a diploid sporophyte. Under favourable conditions the spore can develop into a new organism using mitotic division, producing a multicellular gametophyte, which eventually goes on to produce gametes.
What two types of spores are produced by meiosis?
Formation of reproductive spores
In meiotic sporogenesis, a diploid spore mother cell within the sporangium undergoes meiosis, producing a tetrad of haploid spores. In organisms that are heterosporous, two types of spores occur: Microsporangia produce male microspores, and megasporangia produce female megaspores.
Do sporophyte produces spores by meiosis?
The sporophyte produces spores (hence the name) by meiosis, a process also known as “reduction division” that reduces the number of chromosomes in each spore mother cell by half. The resulting meiospores develop into a gametophyte. … The mature gametophyte produces male or female gametes (or both) by mitosis.
Does meiosis produce spores or gametes?
Fusion of the male and females gametes forms the diploid zygote, which develops into the sporophyte. After reaching maturity, the diploid sporophyte produces spores by meiosis, which in turn divide by mitosis to produce the haploid gametophyte. The new gametophyte produces gametes, and the cycle continues.
How do spores form?
Spores are usually haploid and unicellular and are produced by meiosis in the sporophyte. Once conditions are favorable, the spore can develop into a new organism using mitotic division, producing a multicellular gametophyte, which will eventually go on to produce gametes.
What is an example of a gametophyte?
Examples of Gametophytes
The fern you imagine when you think of Jurassic Park or a forest floor is a gametophyte. … A single fern spore can be carried by the wind, land in a new place, and grow into a gametophyte plant. That single gametophyte plant can then self-fertilize and produce a generation of new sporophytes!
How long do fungus spores live?
Fungal spores can live for 12 to 20 months, so it is important that a person disinfects anything that has come into contact with an infected person or animal. These objects include bedding, couch cushions, clothing, and other fabrics.