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BIOGENISIS - Coggle Diagram

- - - - chromosomes coil up
        
        nuclear envelope disappears
        
        spindle fibres are formed
    - - chromosomes line up in the center (middle of the cell)
        
        spindle fibres connect to the chromosomes by their centromeres
    - - chromosomes divide
        
        spindle fibers pull the divided chromosomes to the opposite poles
    - - chromosomes uncoil
        
        nuclear envelopes are formed
        
        two new nuclei are formed
        
        spindle fibres disappear
    - - division of the rest of the cells after the nucleus divides to forms two haploid cells
    - - period of self-growth and development of the cell
        
        DNA replication takes place
        
        the cell grows and carries out normal activities
        
        the cell spends 90% of its life cycle in this phase
  - - - prophase I - chromosomes condense and nuclear envelope breaks down, crossing over happens now
        metaphase I - pairs of homologous chromosomes move to the center of the cell
        anaphase I - homologous chromosomes move to the opposite ends of the poles by spindle fibers
        telophase I & cytokinesis - chromosomes gather at the poles of the cells and cytokinesis divides
    - - prophase II - a new spindle fiber forms around the chromosomes
        metaphase II - chromosomes line up with the equator
        anaphase II - centromeres divide and chromosomes move to the opposite ends of the poles
        telophase II & cytokinesis - a nuclear envelope forms around each set of chromosomes and the cytoplasm divides.