BIO17-MeiosisWEB - Outline 17 Mitosis Meiosis continued...

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1 10/31/2008 1 17 Mitosis & Meiosis continued November 5 10/31/2008 2 Outline ± Revisit mitosis ± Meiosis ± Mitosis compared to meiosis ± Connect the concepts: ² cell cycle ² mitosis ² meiosis 10/31/2008 3 Mitosis Purpose? 10/31/2008 4 Meiosis Purpose: 1. ____________________ 2. ____________________
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2 10/31/2008 5 Meiosis Purpose: 1. keep chromosome number constant across the generations— so what must happen in the number of chromosomes from parent cell to gamete cells? 1. ensure that each gamete contains only one member of each homologous pair what is a homologous pair? 10/31/2008 6 Meiosis Overview Two successive nuclear divisions occur: Meiosis I (Reduction) Meiosis II (Division). Meiosis I reduces the ploidy level from 2n to n (reduction) while Meiosis II divides the remaining set of chromosomes in a mitosis-like process (division). Most of the differences between mitosis & meiosis occur during Meiosis I. 10/31/2008
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This note was uploaded on 04/25/2010 for the course BIO BIO152 taught by Professor Cordon during the Fall '09 term at University of Toronto.

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BIO17-MeiosisWEB - Outline 17 Mitosis Meiosis continued...

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