lec05 - meiosis reduces ploidy Lecture 5 Meiosis I. A few...

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meiosis reduces ploidy # cells produced homologues pair Lecture 5 – Meiosis  I. A few important points about meiosis A. cell division that reduces chromosome number by 1/2 2n four 1n  cells B. crossing over used to increase genetic diversity of gametes produced II. Overview of meiosis A. homologues pair B. 1 st  division: 2n cell divides to give two 1n cells C. 2 nd  division: each 1n cell divides to give total of four 1n cells  Two stages: meiosis I and  meiosis II III. Meiosis in detail 1
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Picture 2 Picture 2 Picture 6 Picture 23 Picture 3 Picture 24 A. meiosis I 1. prophase I a. leptotene b. zygotene synapsis =  c. pachytene bivalent =  2
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Picture 7 Picture 25 Picture 8 Picture 26 Picture 9 tetrad = d. diplotene chiasmata = crossing over = e. diakinesis 2. metaphase I 3
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Picture 27 Picture 10 Picture 37 Picture 38 Picture 1 Picture 35 Picture 36 3. anaphase I 4. telophase I IV. Meiosis II A. between meiosis I and II
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This note was uploaded on 07/01/2011 for the course L 311 taught by Professor Forrester during the Fall '10 term at Indiana State University .

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lec05 - meiosis reduces ploidy Lecture 5 Meiosis I. A few...

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