Mitosis and Meiosis Higher Biology Mitosis and Meiosis Mitosis: -division of somatic (body) cells Meiosis -division of gametes (sex cells)

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Presentation transcript:

Mitosis and Meiosis Higher Biology

Mitosis and Meiosis Mitosis: -division of somatic (body) cells Meiosis -division of gametes (sex cells)

Mitosis Interphase Prophase Metaphase Anaphase Telophase

Interphase Interesting things happen! 1.Cell preparing to divide 2.Genetic material doubles

Prophase Chromosome pair up! 1.Chromosomes thicken and shorten -become visible -2 chromatids joined by a centromere 2.Centrioles move to the opposite sides of the nucleus 3.Nucleolus disappears 4.Nuclear membrane disintegrate

Metaphase Chromosomes meet in the middle! 1.Chromosomes arrange at equator of cell 2.Become attached to spindle fibres by centromeres 3.Homologous chromosomes do not associate

Anaphase Chromosomes get pulled apart 1.Spindle fibres contract pulling chromatids to the opposite poles of the cell

Telophase Now there are two! 1.Chromosomes uncoil 2.Spindle fibres disintegrate 3.Centrioles replicate 4.Nucleur membrane forms 5.Cell divides

Meiosis 4 daughter cells produced Each daughter cell has half the chromosomes of the parent 2 sets of cell division involved

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