NEET BIOLOGY

Detailed explanation-1: -And when the chromosomes are condensing to undergo mitosis, the centrioles form the areas that mitotic spindle forms from. And those mitotic spindles go and attach to each of the chromosomes and pull the chromosomes to opposite ends of the cell to allow cytokinesis, then, to occur.

Detailed explanation-2: -The mitotic spindle is a microtubule-based organelle responsible for ensuring accurate chromosome segregation during cell division (Mitchison and Salmon, 2001). This structure, which is shaped much like an American football, has to be built by the cell prior to each round of division.

Detailed explanation-3: -Centrioles are responsible for organizing the spindle fibers in the mitotic spindle apparatus and are thought to participate in the completion of cytokinesis during the process of cell division.

Detailed explanation-4: -“Centriole is an organelle, cylindrical in shape, that is composed of a protein called tubulin.”

Detailed explanation-5: -The two pairs of centrioles keep very close to one another until the prophase stage of mitosis. At this point they separate with both pairs of centrioles moving over the outer surface of the nuclear envelope to opposite ends or ‘poles’ of the cell, to form the astral poles of the dividing cell.