Mitosis and Cytokinesis Cell Division Mitosis and Cytokinesis

Cell Reproduction Interphase Mitosis (Division) Cytokinesis (Division) Cell growth, DNA synthesis, Growth and Preparation Mitosis (Division) dividing the nucleus into two daughter nuclei Cytokinesis (Division) separating the organelles and the cytoplasm

Mitosis Mitosis is a continuous process that can be observed in four stages: Prophase Metaphase Anaphase Telophase

Prophase 1 Chromosomes begin to condense The nuclear membrane breaks down. Spindle which is made up of several spindle fibers form. run at a right angle to the cell’s equator. An organelle called the centrosome helps assemble the spindle. animal cells includes a pair of centrioles centrosomes move to opposite poles of the cell

Metaphase Chromosomes are packaged into their most condensed form. Nuclear membrane is fully dissolved Chromosomes move to the center of the cell Spindle fibers form a link between the poles and the centromere of each chromosome.

Anaphase Spindle fibers shorten Sister chromatids move toward opposite poles as the spindle fibers shorten. Each pole now has a full set of chromosomes.

Telophase A nuclear envelope forms around the chromosomes at each pole of the cell. Chromosomes now uncoil. The spindle dissolves. Mitosis is complete.

Cytokinesis The cytoplasm is separated Two daughter cells are formed Have half of the parent’s cytoplasm and organelles Genetically identical diploid cells After cytokinesis, each cell enters the G1 stage of interphase.

Summary The life of a eukaryotic cell cycles through; Growth, DNA replication preparation for cell division division of the nucleus and cytoplasm Mitosis is a continuous process that includes four stages: Prophase Metaphase Anaphase Telophase Cytokinesis the cell membrane grows into the center of the cell and divides it into two daughter cells each daughter cell has about half of the parent’s cytoplasm and organelles