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Mitosis and Meiosis; Cell Division

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Mitosis and Meiosis; Cell Division Reproduction: cells -- organisms • asexual reproduction • mitosis – No need to find a – cloning mate = genetically identical generations • sexual reproduction • meiosis – need a mate – halving of genetic – genetic mixing information – DIVERSITY Spider plant spidering http://greenscenes.biz/images/catalog_library/spider_plant.jpg Spiders rooting http://susanmurphy.blogspot.com/2012/03/painting-plant-roots-in-watercolor.html Grafting fruit trees http://mycotopia.net/forums/attachments/holding-tank/83872d1208298670- its-about-time-fruit-crop-grafting-apples-graftedtree.jpg?stc=1 What cells do mitosis? [what cells mitose?] 1. All cells 2. Any cell might 3. Only germ cells for sexual reproduction 4. Only in growing organisms 5. Only in growing tissues What cells do meiosis? [what cells meiose?] 1. All cells 2. Any cell might 3. Only germ cells for sexual reproduction 4. Only in growing organisms 5. Only in growing tissues MITOSIS - MEIOSIS • NUCLEAR EVENTS: mitosis & meiosis • CYTOPLASMIC EVENTS: cell division Mitosis & Meiosis • mitosis ~ 1 min • cell division under phase contrast microscope • A structure of cell in 3d showing its nucleus,chromatin, chromosomes, genes & DNA - 00:45 - Aug 31, 2008 • http://www4.nau.edu/biology/bio100/Lab%20Exercises/mitosism eiosis.htm# • Xenopus: https://www.youtube.com/watch?v=R2-Ji3Sgon4 or http://www.cellimagelibrary.org/images/35617 • Cancer: https://www.youtube.com/watch?v=PwqY99gNipE CELL CYCLE http://www.ch.ic.ac.uk/local/projects/s_liu/Html/Graphics/CellCycle.gif Mitosis stages http://www.yorktech.com/science/images/mitosis_phases.jpg cytokinesis = cell division http://faculty.stcc.edu/BIOL102/images/cytokinan.jpg http://faculty.stcc.edu/BIOL102/images/cytokinpl.jpg cytokinesis in cleavage http://1.bp.blogspot.com/-ZH7rw4yS6FY/UFshhAa-PRI/AAAAAAAAATY/1a60QjpeR0s/s320/cytokinensis+in+animals.jpg MAKING GAMETES MAKING I N A N I M A L S http://greatneck.k12.ny.us/GNPS/SHS/dept/science/krauz/regents_bio_lecture_notes/notes%20as%20webp age/Notes_on_Reproduction_and_Development_files/image020.gif plants do, too http://www.sccs.swarthmore.edu/users/00/aphilli1/cpd/flowerParts.jpg “alternation of generations” http://classconnection.s3.amazonaws.com/38/flashcards/1293038/jpg/pine_life_cycle1332005367316.jpg Phases of mitosis http://publications.nigms.nih.gov/insidethecell/images/ch4_phases_allbig.jpg Phases of mitosis http://greatneck.k12.ny.us/GNPS/SHS/dept/science/krauz/handouts/reproduction_diagrams_files/image003.jpg http://www.nature.com/nrc/journal/v7/n2/images/nrc2049-f1.jpg Mitotic defects common in cancer http://www.nature.com/onc/journal/v30/n25/images/onc201130f3.jpg Mitotic Defects (examples) http://www.nature.com/nrc/journal/v5/n10/images/nrc1714-f1.jpg meiosis http://www4.nau.edu/biology/bio100/Lab%20Exercises/mitosismeiosis.htm# Mitosis and Meiosis • Mitosis: http://www.ivy- rose.co.uk/HumanBody/Cells/Cell-Division_Mitosis- Diagram.php • Meiosis: http://www.answers.com/topic/meiosis • Another source – with a cartoon http://www.hartnell.edu/tutorials/biology/meiosis.html Meiosis Overview http://creationrevolution.com/wp-content/uploads/2011/03/Meiosis_diagram-adj.jpg Meiosis I & II stages http://www.phschool.com/science/biology_place/labbench/lab3/images/stages2.gif Prophase I Detail http://www.nature.com/scitable/content/35062/sadava_9_16_big_LARGE_2.jpg GAMETES Stages of meiosis http://www.vcbio.science.ru.nl/public/Final- Images/PL_Final685m_251- 300/PL0286_685mLiliumMeiosisCombination.jpg Prophase I substages http://www.insectscience.org/13.39/Wisoramfig2.png http://www.vcbio.science.ru.nl/public/Final -Images/AN_Final512z_051- 100/AN0098_512zLocustaMeiosisCombina tion.jpg Compare mitosis & meiosis http://www.accessexcellence.org/RC/VL/GG/images/comparison.gif MEIOSIS RESULTS IN Direction of migration GAMETES THAT DIFFER FROM EACH + or + OTHER INTRO- DUCING EVEN MORE VARIATION Ow? Selected species Chromosome number The more adders-tongue fern 1,440 Record high number! chromosome, chicken 78 the more cat 38 dog 78 variety due horse 64 donkey 62 to meiosis mule 63 and sexual catfish 58 goldfish 94 reproduction fruit fly 8 human 46 mosquito 6 http://en.wikipedia.org/wiki/List_of_o rganisms_by_chromosome_count pea 14 shrimp 254 .
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