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Reproduction Viral Reproduction Viruses Prokaryotic Reproduction Bacterial Fission Eukaryotic Reproduction Chromosome Structure Allium Root Meristem -A Mitotic Figures - Allium Region of Cell Division Three kinds of eukaryotic cell reproduction Eukaryotic Life Cycles Cell Cycle Chromosome Structure Monads and Dyads Dyad Chromosomes Ploidy and Chromosome Structure Mitosis Mitosis A Metaphase Spindle Mitotic Phases - Plant Sexual Reproduction Meiosis and Syngamy Eukaryotic Life Cycle Meiosis Meiosis Meiosis I Bivalent 2 paired homologues (4 chromatids) 5 cross-overs Why Did Meiosis Evolve? Crossing-over Requires Multiple Heterozygosity Syngamy Produces Heterozygosity Required for Meiosis to Function Spindle Connections in Cell Divisions Syngamy (Fertilization) Fusion of an Egg and a Sperm Syngamy SEM Sperm, Egg, and Zygote