List the three types of structures that microtubules organize into and their function in dividing sister chromatids between the two daughter cells in cell division

Biology · College · Tue Nov 03 2020

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Microtubules organize into three main structures during cell division:


Spindle Fibers (Mitotic Spindle): Microtubules form a spindle apparatus that includes spindle fibers. The spindle fibers are involved in separating sister chromatids during both mitosis and meiosis. They attach to the centromeres of chromosomes and help pull the chromatids apart toward opposite poles of the dividing cell.


Centrioles (or Centrosomes): Microtubules are arranged in centrioles, which are cylindrical structures located near the nucleus. Centrioles play a crucial role in organizing the spindle fibers during cell division. They are particularly involved in the formation of the mitotic spindle.


Asters: Asters are radial arrays of microtubules that extend from the centrosome. They contribute to the positioning and movement of the spindle apparatus during cell division. Asters are essential for ensuring proper alignment and separation of chromosomes.


These structures collectively contribute to the accurate segregation of sister chromatids during cell division, ensuring that each daughter cell receives the correct complement of genetic material.

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