Anaphase
The anaphase is a very fast phase of the Méiose and Mitose where the Chromosome S separate and migrate towards the opposite poles of the cell. During this phase, following a specific signal, the Chromatide S sisters separate brutally. They “are then drawn” by the microtubules in direction from the pole to which they are ratachées. The chromatides migrate quickly at a speed of approximately 1µm/min. One generally divides the anaphase into two distinct phases. During the anaphase has, the chromatides, actually, move in direction of the pole on the microtubules kinétochoriens which shorten because they depolymerize progression of the kinétochore progressively. Indeed, the Kinétochore S not only make it possible “to fasten” a Chromatide with the microtubule, but also to make them transport along the microtubules. On the level of the kinétochores one finds “engines” molecular (of type Dynéine) using ATP which make it possible to tractor draw the chromatides along the microtubules which them, remain fixed. During the anaphase B, the polar microtubules lengthen, and the pole of the spindle mitotic move away one from the other involving with them the chromatides.
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