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initiation of assembly of mitotic spindle ,the microtubules help in this process ..there is 2nd pt. of prophase in ncert like this what does it mean? is it mean that microtubules help or assemble .?

initiation of assembly of mitotic spindle ,the microtubules help in this process ..there is 2nd pt. of prophase in ncert like this what does it mean? is it mean that microtubules help or assemble .?

Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago

Mitotic spindles are micro-tubule based structures that play a role in separating the chromosomes of sister chromatids. Prior to cell division, centrosome replicates to form spindle that helps move the chromosomes of the sister chromatids to two opposite poles of the cell.

Before the initiation of cell division, there has to be initiation and assembly of spindle, microtubules, the proteinaceous components i.e. Katanin, Kinesin, Dynein, all of which help to organize the spindle by forming kinetochore microtubules and polar microtubules for the attachment of chromosomes along the equatorial plane of the cell.

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