Mitosis and Meiosis
-division of somatic (body) cells
-division of gametes (sex cells)
Interesting things happen!
Cell preparing to divide
Genetic material doubles
Chromosome pair up!
Chromosomes thicken and shorten
-2 chromatids joined by a centromere
Centrioles move to the opposite sides of the nucleus
Nuclear membrane disintegrate
Chromosomes meet in the middle!
Chromosomes arrange at equator of cell
Become attached to spindle fibres by centromeres
Homologous chromosomes do not associate
Chromosomes get pulled apart
Spindle fibres contract pulling chromatids to the opposite poles of the cell
Now there are two!
Spindle fibres disintegrate
Nucleur membrane forms
4 daughter cells produced
Each daughter cell has half the chromosomes of the parent
2 sets of cell division involved