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Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is

necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis.

At the beginning of nuclear division, two wheel-shaped protein structures called

centrioles position themselves at opposite ends of the cell forming cell poles. Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle.

Some of the microtubules attach the poles to the chromosomes by connecting to protein complexes called kinetochores. Kinetochores are protein formations that develop on each chromosome around

the centromere, which is a region located near the middle of a chromosome.

Other microtubules bind to the chromosome arms or extend to the opposite end of the cell. During the cell division phase called metaphase, the microtubules pull the chromosomes back and forth until they align in a plane along the equator of the cell, which is called the equatorial plane.

The cell goes through an important checkpoint to ensure that all of the chromosomes are attached to the spindle and ready to be divided before it proceeds with division. Next, during anaphase, the chromosomes are simultaneously separated and pulled by the spindle to opposite poles of the cell.

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Related Questions

During this stage of mitosis, when do the chromosomes become attached to the spindle fibers?

During metaphase of mitosis, the chromosomes become attached to the spindle fibers.


During which step in mitosis do the chromosomes get attached to the spindle apparatus?

During the metaphase stage of mitosis, the chromosomes become attached to the spindle apparatus.


During which phase of mitosis are chromosomes attaching to the spindle?

Chromosomes attach to the mitotic spindle during the metaphase of mitosis. Part of the answer depends on how you define the stages of mitosis and not everybody does this the same way. The short answer is all of them.


During what phase of mitosis does the spindle disperse?

The answer is telophase.


When during mitosis do chromosomes attach to spindle fibers?

Chromosomes attach to spindle fibers during metaphase of mitosis. This is when the chromosomes align at the cell's equator, forming a metaphase plate. The spindle fibers attach to the centromere region of the chromosomes.


What does a spindle apparatus do in mitosis?

Separation of chromatids during anaphase .


What are chromosomes separated by during mitosis?

the spindle fibers


What kind of fibers do animal and plants have during mitosis?

spindle


Which organelleshoots out spindle fibers that attachto chromosomes during mitosis?

Centrioles


What is the forms between poles of a cell during mitosis and meiosis?

the spindle


What are the thin tubes between the centrioles during mitosis?

Spindle Fibers


What is responsible for forming spindle during mitosis?

The centrioles within the cell form the mitotic spindle.