Meiosis http://www.biology.arizona.edu/cell_bio/tutorials/meiosis/main.html
Interphase Same as in mitosis Growth and Replication G1 – cell growth G2 – replication of chromosoms G3 – growth and preparation for cell division
Chromosomes
Karotype
Prophase I Chromosomes thicken and condense ( become visible) Centrioles move to the poles Nuclear envelop disappears Homologous chromosomes come together during SYNAPSIS to form a TETRAD Crossing-over occurs
Metaphase I Chromosomes move to the equator as a tetrad Spindle fibers attach to chromosome
Anaphase I Spindle fibers shorten Homologous chromosomes separate and move to the poles
Telophase I / Cytokinesis Cell membrane begins to pinch in Nuclear membrane reappears The cytoplasm divides Formation of cell membrane Results in two haploid daughter cells
Meiosis II Proceeds just as mitosis with the exception of chromosome replication. THEY DO NOT REPLICATE AGAIN!!! Prophase II Metaphase II Anaphase II Telophase II Cytokinesis
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