AP BIOLOGY

Detailed explanation-1: -Spindle fibres attach themselves to the kinetochore of the chromosomes and help to pull sister chromatids towards opposite poles. Kinetochores are proteinaceous disc-like structures present on the sides of the centromere.

Detailed explanation-2: -They attach at a point called the kinetochore, which is a disk or protein that is on each side of the centromere. The spindle fibers will move the chromosomes until they are lined up at the spindle equator.

Detailed explanation-3: -During metaphase, each chromosome gets attached to two spindle fibres, one from each pole, in the region of its kinetochores.

Detailed explanation-4: -Chromatid During cell division, spindle fibers attach to the centromere and pull each of the sister chromatids to opposite sides of the cell.