Rudolf Virchow: omnis cellula e cellula (cell is derived from cell)
Strasburg: nucleus formed from preexisting ones
Boveri & Flemming: Somatic cell division
Flemming: coined mitosis
Benedin, Strasburger, Sutton & Winiwater: Chr. Reduced to half in gametes
Farmer & Moore: gave term meiosis
The cell is preparing for division.
DNA is duplicated
Cell increases in size.
Majority of the cell's lifespan is spent in interphase.
Mitotic spindle is formed from microtubules that gradually lengthen driving the division of the cell.
Nuclear envelope breaks down
Condensed chromosomes come into direct contact with the microtubules
Condensed chromosomes line up along the equator
Sister chromatids are drawn to opposite poles
Duplicate copies of the cell's DNA are on either side of the cell
Microtubules get shorter, which begins to allow the cell to separate.
Nuclear envelope reforms as two new nuclear envelopes around the separated sister chromatids.
Cytokinesis takes place.
Cytoplasm is equally divided between the two new daughter cells