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What is a centriole, why does it duplicate and what is its function?

Centrioles are organelles situated in the cytoplasm close to the nuclear envelope in animal and simpler plant cells. They occur in pairs and lie at right angles to each other. It forms spindle fibres during cell division. It duplicates to form two sets and one set each moves to the opposite poles of the cell to form spindle fibres to  pull a set of chromosome each arranged at the metaphasic plate.

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Centrioles are the small cell organells found in the nucleus of the cell.Their main function is to help the cell at the time of cell division.they are not often seen in other period except in cell division.it is involved in both mitosis as well as in meiosis.They produce fibre like structure which is the spindle fibre thus helping the cell to divide..

Centrioles duplicate once per cell cycle and duplication is coordinated by Polo-like kinase 4 (Plk4).

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