Medical Definition of SCINTILLATING SCOTOMA. : a blind spot in the visual field that is bordered by shimmering or flashing light and that is often a premonitory symptom of migraine attack. a blind spot in the visual field that is bordered by shimmering or flashing light and that is often a premonitory symptom of migraine attack.
The centromeres of chromosomes attach to the spindle fibers during metaphase. The spindle fibers bring about the separation of sister chromosomes to the opposite poles.When s â¦ pindle fibers do not attach to the centromeres, the doubling of chromosomes leads to polyploidy in the cell.Answered.he centromeres of chromosomes attach to the spindle fibers during metaphase. The spindle fibers bring about the separation of sister chromosomes to the opposite poles.
Spindle fibers consist of fibers made of microtubules and associated proteins. While the mitotic spindle assembles, the other microtubules of the cytoskeleton partially disass â¦ emble, probably providing the material used to construct the spindle.pindle fibers shorten during anaphase I and anaphase II in meiosis in order for both the separation of the homologous chromosomes and the sister chromatids to opposite poles â¦ before telophase I and II.