Mitosis Flashcards
products of mitosis
two genetically identical daughter cells
mitosis is used for …
growth, repair and asexual reproduction
mitosis cell cycle
see diagram
cytokinesis in general
when the cell splits in two, forming two identical daughter cells.
cytokinesis in animal cells
the plasma membrane folds inwards until the two dents meet to separate the two daughter cells
cytokinesis in plant cells
cellulose starts to build up at the equator (the end plate). Plasma membrane forms in the middle of the end plate resulting in two fully separated plant cells
interphase
interphase consists of two growth phases (G1&G2) and a DNA synthesis stage (S). The cell may exit the cell cycle at G0
mitosis stages
prophase metaphase anaphase telophase
prophase
DNA condenses & coils, nuclear envelope breaks down, centrioles move to opposite poles
metaphase
Spindle fibres attach to centromeres & chromosomes line at the equator
anaphase
Centromeres divide, chromatids move to opposite poles
telophase
Chromosomes uncoil, nuclear envelope reforms
What are Cell cycle checkpoints?
ensure the cell only divide at the appropriate time when ready and helps detect DNA damage
Describe the Restriction Point or G1/S Checkpoint (location and function)
location - Between G1 and S function - Decides whether cell proceeds to S-Phase..
Describe G1 Checkpoint (location and function)
location - end of G1 function - Checks cell is ready for S-Phase
mitosis sections diagram
see photo
mitosis cell diagram stages diagram
see photo
