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Cell Cycle

Cell Cycle. Functions. GROWTH. REPRODUCTION. REPLACEMENT. Genome. Entire set of DNA in each cell of an org Normally one circular chromosome in prokaryotes. Binary Fission. Single chromosome replicates One pulls away Membrane & wall separate cell. Binary Fission.

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Cell Cycle

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  1. Cell Cycle

  2. Functions GROWTH REPRODUCTION REPLACEMENT

  3. Genome • Entire set of DNA in each cell of an org • Normally one circular chromosome in prokaryotes

  4. Binary Fission • Single chromosome replicates • One pulls away • Membrane & wall separate cell

  5. Binary Fission • A single cell of Serratiamarcescens just landed on your eyeball. This bacterium has the potential to divide every 30 minutes. How many cells will be on your eyeball in... • One hour? • Four hours? • One whole day? • How will the observed values be different from the expected values you calculated? Explain why.

  6. Human Genome • 6,000,000,000 base pairs long • Split into 46 chromosomes • 23 are maternal • 23 are paternal Diploid (2n)

  7. Cell Cycle Cell Growth DNA Replication Normal Function Splitting of the rest of the cell Cell Growth Identical distribution of replicated DNA into nuclei of 2 daughter cells

  8. Interphase - DNA Replication • Each chromosome replicates to form identical chromatids • Attached by centromeres

  9. Prophase • Chromosomes coil • Spindle forms • Nuc envelope breaks down

  10. Metaphase • Spindle fibers force chromosomes to metaphase plate

  11. Anaphase • Chromatids move to opposite poles

  12. Telophase • Nuclear envelopes reform • DNA uncoils

  13. Cytokinesis (animal) • Microfilaments pinch off cell

  14. Cytokinesis (Plant) • Cellulose vesicles form new cell wall

  15. Mitotic Review

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