_dnadivide/ Cell Growth Mrs. Harlin

1.2.2  Analyze how cells grow and reproduce in terms of interphase, mitosis and cytokinesis.

1. Interphase (cell appears normal) G0- cell is carrying out normal activity Growth 1 (G1 phase)- growth of cell Growth 1 (G1 phase)- growth of cell Synthesis (S phase)- DNA is copied Synthesis (S phase)- DNA is copied Growth 2 (G2 phase)- more growth Growth 2 (G2 phase)- more growth 2. Mitosis-cell division Prophase Prophase Metaphase Metaphase Anaphase Anaphase Telophase Telophase 3. Cytokinesis- cytoplasm divides; division complete

Asexual Reproduction  Mitosis is considered asexual reproduction because it produces IDENTICAL copies of a cell for growth and repair.  There is genetic stability- no variation!

2 daughter cells identical to original Parent cell Chromosomes are copied and double in number Chromosomes now split

Cell grows and carries on metabolism; chromatin is replicated and condensed so sister chromatids are joined at the centromere. Cell grows and carries on metabolism; chromatin is replicated and condensed so sister chromatids are joined at the centromere. It is the longest phase. It is the longest phase.

 Nuclear envelope disappears  Spindle fibers form which are attached to 2 centrioles (only found in animal cells).  Chromatin coils to form visible chromosomes.  Chromosomes attach to spindle.

Chromosomes are lined up at the equator (middle) of the spindle. Chromosomes are lined up at the equator (middle) of the spindle. Centrioles are at opposite ends of the cell. Centrioles are at opposite ends of the cell.

Centromeres split and sister chromatids are pulled apart to opposite poles of the cell. Centromeres split and sister chromatids are pulled apart to opposite poles of the cell.

Nuclear envelope reforms around chromosomes at each pole. Nuclear envelope reforms around chromosomes at each pole.

The splitting of the cytoplasm to form 2 distinct cells. The splitting of the cytoplasm to form 2 distinct cells.

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