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: -During metaphase, spindle fibers attach to the centromere of each pair of sister chromatids (see Figure below). The sister chromatids line up at the equator, or center, of the cell. This is also known as the metaphase plate.

Detailed explanation-3: -Centromere The centromere appears as a constricted region of a chromosome and plays a key role in helping the cell divide up its DNA during division (mitosis and meiosis). Specifically, it is the region where the cell’s spindle fibers attach.

Detailed explanation-4: -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-5: -Spindle fibres attach to kinetochore of chromosomes during metaphase.