centriols
The kinetochore anchors chromosomes to microtubules in the spindle during cell division. The centrosome serves as a nucleating center for microtubules in the spindle and anchors them to opposite sides of the cell.
Spindle
During metaphase of mitosis, the chromosomes become attached to the spindle fibers.
During the metaphase stage of mitosis, the chromosomes become attached to the spindle apparatus.
Chromosomes attach to spindle fibers during metaphase of mitosis. This is when the chromosomes align at the cell's equator, forming a metaphase plate. The spindle fibers attach to the centromere region of the chromosomes.
prophase
Chromosomes attach to the mitotic spindle during the metaphase of mitosis. Part of the answer depends on how you define the stages of mitosis and not everybody does this the same way. The short answer is all of them.
The stage of mitosis when spindle fibers attach to the centromeres of sister chromatids is called metaphase.
Chromosomes line up at the equator of the spindle during the metaphase stage of mitosis. This is when the chromosomes are maximally condensed and are attached to the spindle fibers at their centromeres.
The answer is telophase.
The cellular component that helps pull apart the chromosome in mitosis and meiosis are the spindle fibers. These spindle fibers are made of micro-tubules.
telophase