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03-Meiosis - Outline Reproduction Zygote Nuclear division...

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1/27/10 Bio 151 - Prof. Autumn 1 Mitosis & Meiosis Bio 151 Investigations in Genetics and Evolution Prof. Kellar Autumn [email protected] 1/27/10 Bio 151 - Prof. Autumn 2 Outline Reproduction Zygote Nuclear division Cell division - growth Plants vs. Animals Chromosomes Not visible during Interphase Chromosome number Diploid Haploid Banding Mitosis = Duplication Phases of Mitosis Meiosis = “Lessening” Why amount of genetic material doesn’t double with each generation Chromosomes & genes behave similarly Phases of Meiosis Crossing over = Recombination A major nonmutational source of genetic variation Life cycles 1/27/10 Bio 151 - Prof. Autumn 3 Male & Female Gametes form a Zygote 1/27/10 Bio 151 - Prof. Autumn 4 Life Cycles Animals Plants Tree Pollen
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1/27/10 Bio 151 - Prof. Autumn 5 Mitosis Credit: DNA From the Beginning; http://vector.cshl.org/dnaftb/asp/ Cells all have chromosomes!
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