mitotic phases

prophase events

spindle assembly starts via increasing length of microtubules combine off the centrioles; nuclear envelope breaks; sister chromatids pair to form chromosomes; nucleolus disappears

centromeres

proteins that connect sister chromatids together

Miotic phases in order

Prophase, metaphase, anaphase, telophase, cytokenisis

events associated with metaphase

centromeres line up in the middle known as metaphase plate; centromeres are connected to spindle fibers called kinetochores; mitosis cannot occur until chromosomes are aligned to prevent daughter cells from receiving wrong number of chromosomes

metaphase plate

imaginary line in the middle of metaphase

events during anaphase

spindle fibers shorten pulling sister chromatids apart towards both poles of the cell; shortest phase

Events during telophase

nuclear envelope reforms around chromatids on either side of dividing cell; nucleolus forms; spindle assembly returns to resting state; chromatids diffuse going back to chromatin; cytokinesis continues

events of cytokinesis

two daughter cells will form