Meiosis Definition Prophase 1 Metaphase 1 Anaphase 1 Telophase 1 Prophase 2 Metaphase 2 Anaphase 2 Telophase 2 1 Definition: Meiosis: a form of cell division that halves the number of chromosomes when forming specialized reproductive cells such as gametes or spore Another Important Term: Independent Assortment- random distribution of homologous chromosomes during meiosis 2 Meiosis Prophase I − − − − Chromosomes become visible Nuclear envelope breaks down Crossing-over occurs portions of a chromatid on one homologous chromosome are broken and exchanged with the corresponding chromatid portions of the other homologous chromosome Diploid (2n) 3 4 0 5 0 6 7 8 9 10 On the Back of your flip book: Meiosis In males: Spermatogenesis- the process by which sperm is produced Meiosis in Females: Oogenesis- process by which female gametes (eggs/ovum) are produced You will need to draw the next diagram. (pg. 148 in your textbook) 11 12
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