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Question 36 of 38

Q.What is meant by Amitosis?

Tamil Nadu DgeTamil Nadu HSC First Year (DGE) Board 2026Subjective· 2mImportance★★★★★
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Concept understanding — Amitosis

Amitosis, or direct/incipient cell division, is the simplest pattern of cell division: no spindle apparatus ever forms and the chromatin never condenses into visible chromosomes. It proceeds in two mechanical steps - karyokinesis, in which the nucleus develops a central, dumbbell-shaping constriction that deepens until it splits the nucleus in two, followed by cytokinesis, in which the plasma membrane develops a matching constriction that deepens centripetally until the whole cell is divided. Amitosis is restricted to a few specialised or degenerating cell types, including mammalian cartilage cells, the macronucleus of the ciliate Paramecium, and old, degenerating cells of higher plants. Because there is no spindle to distribute ch …

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