Cell growth, Division and Reproduction
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Transcript of Cell growth, Division and Reproduction
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Cell growth, Division and Reproduction
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Cell Division
• Produces 2 daughter cell• Asexual Reproduction – produces genetically
identical offspring from a single parent.– Binary fission in prokaryotic cells– Mitosis in eukaryotic cells
• Sexual Reproduction – offspring produced by reproductive cells of 2 parents.– Meiosis – inherit genetic information from each
parent
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Chromosomes
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Binary Fission
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Cell Cycle – Eukaryote
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Mitosis
• Division of the nucleus• Asexual reproduction• Body cells – somatic cells• 4 phases– Prophase– Metaphase– Anaphase– Telophase
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Interphase
• Growth, DNA synthesis• Prep for Mitosis• Chromatin material,
no chromosomes
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Prophase
• Longest phase• Genetic material condenses• Chromosomes visible• Nuclear envelope disappears• Spindles forming
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Metaphase
• Centromeres of chromosome line up across center of cell
• Spindle fibers connect centromere of chromosome to 2 poles of cell
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Anaphase
• Sister chromatids separate and begin to move apart. Each chromatid is not considered a chromosome.
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Telophase
• Chromosomes uncoil , nuclear envelope reappears, spindle begins to break apart, nucleolus visible.
• Cell division complete
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Cytokinesis
• All that is left is to split the cytoplasm, usually occurs same time as telophase.
• Cell is split into 2• Animal cell has actin filament that draws in
membrane, plant cell produces cell plate