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Fission

Fission


a type of cell division in which overall (i.e., not localised) cell growth is followed by septum formation which typically divides the fully grown cell into two similar oridentical cells.


Fission:This is the division of the parent body into two or more daughter individuals identical to the parent.








Cleavage

Definition


noun


(embryology) The repeated division of a fertilized ovum, producing a cluster of cells with the same size as the original zygote. . (4) (chemistry) The splitting of a large or complex molecule into smaller or simpler molecules.




Supplement


In embryology, cleavage is the first stage of embryogenesis. It pertains to the repeated mitotic division of a zygote into blastomeres that cluster to a compact mass called morula. Cleavage continues until blastula is formed. The various types of cleavage are:



In the first image the 2 daughter cells are exact copies of the mother cell.  In fission the mother cell grows then divides.


In the second image the 2 daughter cells are not copies but gets half of what the mother cell had after the mother cell goes through a complex process of replicating its chromosomes. In embryonic cleavage the original cell does not grow but each generation of cells get smaller and smaller within a cluster.


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