Answer:
Metaphase plate formed by spindle fibers that originate from centrioles.
Step-by-step explanation:
Centriole:
- Centrioles are cell organelles, located near the nucleus, that help in cell division.
- In a non-dividing cell, centrioles are not visible.
- Centrioles form the spindle network that helps in separating the homologous chromosomes in mitosis and sister chromatids in meiosis.
- Centrioles are made up of nine triplets of microtubules that are a special type of fiber made up of the protein, tubulin.
Mitotic Spindle:
- The mitotic spindle is the structure that starts developing early in the prophase and remains till the cell completely divides into two daughter cells.
- Prophase involves the elongation of these spindle fibers towards the chromosomes.
- During the metaphase, the chromosomes arrange themselves on the spindle fiber network or the metaphase plate.
- During anaphase, these fibers pull the chromosomes apart to opposite poles of the cell. This ensures division of equal number of chromosomes in mitosis and half in case of meiosis.