Lecture 6 -...

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Meiosis and sexual reproduction http://www.wineanorak.com/blog/uploaded_images/drosophila-741946.jpg 1
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Last Time Chromosome structure Cell division Binary Fission (prokaryotes) Mitosis/Cell cycle (eukaryotes) structures phases 2
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Meiosis and sexual reproduction Gametogenesis: sperm and egg production Stages of meiosis Important features New perspectives on Mendel’s Laws Sex linked traits Sex determination Key experiments in X-linked traits 3
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Gametogenesis http://www.hrsu.mrc.ac.uk/img/research/gametogenesis_col_200x152.jpg http://www.medimagery.com/gametogenesis.JPG formation of gametes, the products of meiosis, e.g. sperm and egg 4
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Meiosis Swap mitosis with meiosis here in gonad cells Different and dramatic stuff happens in meiosis! 5
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Meiosis Meiosis I Meiosis II 6
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Meiosis - source of variability http://www.cate-blanchett.net/cate-blanchett-1024x768-18641.jpg http://blog.newsok.com/gogreen/files/2008/04/indy.jpg 1st generation 2nd generation 7
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Meiosis > Prophase > subphases Leptotene Zygotene Pachytene Diplotene Diakinesis all the exciting bits happen here!
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Lecture 6 -...

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