Dictionary » S » Spindle fibre

Spindle fibre


noun, plural: spindle fibres

Any of a network of filaments that collectively form a mitotic spindle (in mitosis) and meiotic spindle (in meiosis). It is chiefly involved in moving and segregating the chromosomes during nuclear division.


In mitosis, these filaments form at opposite poles of the cell and meet at the equatorial plane. Collectively, they form a spindle-shaped structure, which is widest at the middle then tapers at both ends.

In mitosis, the spindle fibres form during prophase. During metaphase of cell division, the spindle fibres radiate from the centrioles at the opposite poles. Some of them attach to the kinetochores of the chromosomes while others bind to the arms of the chromosomes, still others continue to grow. When the spindle fibres start to pull the chromosomes (via their kinetochores) to opposite poles, this marks the anaphase of cell division.

Variant: spindle fiber


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Results from our forum

Does NOT contain microtubles...

a) Hair fibres (if this is it, then does that mean this is a spindle fibre, cilia??) b) Flagella

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by TwinkleK
Sat Feb 11, 2012 9:43 pm
Forum: Human Biology
Topic: Does NOT contain microtubles...
Replies: 1
Views: 2698

Cell Cycle

... and centrosome divides to give to centriole on two poles. It forms spindle fibres on both the poles 2. Metaphase - In this phase the chromosomes come to the equatorial ...

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by asutoshsahu
Fri Oct 14, 2005 10:11 am
Forum: Genetics
Topic: Cell Cycle
Replies: 13
Views: 11956

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