Please enable JavaScript.
Coggle requires JavaScript to display documents.
UNIT 8 CELL DIVISION (Cell Cycle (G1 (cell increases in size), G2…
UNIT 8 CELL DIVISION
Cell Cycle
-
-
-
-
-
G0
if the cell does not have the correct amount of resources or is damaged, it can stop the cycle.
MITOSIS
-
PHASES
Prophase
The first stage of mitosis, The cell’s chromatin condenses into chromosomes and they become visible. The nuclear membrane disappears as well. Centrioles move to opposite sides of the cell
Metaphase
The second stage of mitosis. The chromosomes line up along the equator and are the spindle fibers (microtubules) occurring from the centrosomes attach to the centromeres of the
chromosomes and prepare to pull the chromosomes apart.
Anaphase
The third stage of mitosis. The spindle fibers pull apart the chromosomes to opposite sides of the cells
Telophase
The fourth stage of mitosis. A new nuclear membrane begins to form around the chromatids. The cell begins to separate into 2 daughter cells.
Cytoknesis
The fifth stage of mitosis. Literally means “cell movement” the two 2 new daughter cells with identical DNA move away from each other.
MEIOSIS
Cell division that results in 4 daughter cells each with half the number of chromosomes as the parent cell. Used for the production of gametes.
PHASES
Meiosis I - ALL THE PHASES OF MITOSIS OCCUR HERE: Prophase, Metaphase, Anaphase, Telophase, Cytoknesis
Meiosis II
Prophase II
Chromosomes condense, nuclear membrane dissolves, centrosomes move to opposite poles
Metaphase II
Spindle fibres from opposing centrosomes attach to chromosomes (at centromere) and align them along the cell equator
Anaphase II
Spindle fibres contract and separate the sister chromatids, chromatids move to opposite poles
Telophase II
Chromosomes decondense, nuclear membrane reforms, cells divide (cytokinesis) to form four haploid daughter cells