Types Of Meiosis in sexually reproducing Individuals

                                    Types of Meiosis 

Meiosis and fertilization are two essential processes in the life cycle of sexually reproducing organisms. In every such organism, these two events represent alternating phases that work together to maintain a constant number of chromosomes from one generation to the next. Although the timing of meiosis and fertilization may vary among different species, the fundamental processes remain consistent across all sexually reproducing organisms.

Based on the timing and relationship of these events, meiosis can be classified into three types.-

• Gametic 
• zygotic 
• sporogenic 

Gametic - Gametic type of meiosis occurs in the formation of gamete which is haploid in nature. The gamete further gives rise to a diploid zygote. This zygote by mitotic division changed into an organism.  This type of division is generally seen in humans.


Zygotic  -   Zygotic type of meiosis is generally seen in algae and fungi where meiosis division does not occur during gamete formation and in zygote development but after the formation of the zygote, meiosis process started.

•  

• Sporogenic -    In some plant species and some species of algae the multicellular body called sporophyte by meiotic division produces spores. This spores further division changed into a multicellular gametophyte. The cells of gametophyte give rise to gamete by mitotic division. The two haploid gametes then fuse and form a diploid zygote which develops into the next sporophyte generation. 

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