spindle fiber


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spindle fiber

[′spin·dəl ‚fī·bər]
(cell and molecular biology)
One of the fiberlike elements of the spindle; an aggregation of microtubules resulting from the polymerization of a series of small protein fibrils by primary ‒S‒S‒ linkages.
References in periodicals archive ?
For example, the students were asked, "Imagine that spindle fibers did not form during mitosis but the cell still divided into two daughter cells.
1999) showed the highest pregnancy rate in cryopreserved pronuclear embryo and obtained a high implantation rate with an absence of 1-cell and spindle fiber after thawing.
Remember that according to Sherrington's Law of reciprocal inhibition, the tightening of the quads inhibits the response of the spindle fiber organs of the hamstring.
This observation finally settled the dispute about the reality of spindle fibers and their role in segregating chromosomes in the living cell, a hotly debated issue at the time.
The QMS becomes transformed into the functionally bipolar spindle of meiosis I by increased development of spindle fibers and movement of pairs of poles toward a single division axis (Fig.
In the former, the bivalents dispose parallel to the spindle fibers, while in the latter the chromosomes are oriented perpendicularly to the fibers, so sometimes it is called reversed meiosis.
The kinetochore is the part of the centromere to which spindle fibers attach during cell division.
Chromosomes, cell membranes, and spindle fibers are modeled in LEGOs as the students move through the stages of interphase, prophase, metaphase, anaphase, and telophase.
22d-f) are rod shaped with poles that are more focused than those of first division, [gamma]-Tubulin is distributed along the spindle fibers (Fig.
if all chromosomes are attached to spindle fibers, then mitosis can proceed).
In an effort to avoid injury, the nervous system monitors the intensity of a stretch with receptors called muscle spindle fibers, located within the muscle itself.