C ELL D IVISION Function of Cell Division Mitosis & Cytokinesis C ELL C YCLE cells alternate between stages of dividing and not dividing cell cycle shows the sequence of events between each cell division cell cycle shows the different stages of development that a cell goes through I NTERPHASE cell prepares for cell division increases in cell size increases genetic material DNA in the chromatin duplicates M ITOSIS process where the nucleus in the cell forms two identical nuclei in the original cell process by which nuclear material is divided during cell division P ROPHASE packing of chromatin into short and thick chromosomes nuclear membrane and nucleoli disappear centrioles split and migrate to poles (only in animal cells) spindle fibers attach to centromere of each chromosome P ROPHASE M ETAPHASE spindle fibers pull double stranded chromosomes to the middle of the cell A NAPHASE centromeres pull apart when spindle fibers contract and shorten single stranded chromosomes move away from middle towards opposite poles T ELOPHASE total set of chromosomes at each pole spindle fibers disappear two nuclear membranes and two nucleolus form single stranded chromosomes transform (uncoil) into chromatin C ELL D IVISION & C YTOKINESIS Cell Division refers to the actual splitting of a cell into two halves called daughter cells Cytokinesis separation of cytoplasm separation of organelles into equal parts formation of two daughter cells occurs at the same time as telophase C YTOKINESIS IN A NIMAL C ELLS cell membrane pinches in from the edges forming a cleavage furrow C YTOKINESIS IN P LANT C ELLS new cell wall forms between the 2 daughter cells forming a cell plate