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.
The centrioles align themselves along the line that you are going to divide the chromosomes along, so they make sure the division happens in the right direction. Once they are in position, they produce a bunch of microtubules that are called spindle fibers, and those are what hook onto the chromosomes and pull them apart