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The Cell Cycle

The Cell Cycle. The cell cycle. Image from Purves et al., Life: The Science of Biology , 4th Edition, by Sinauer Associates ( www.sinauer.com ) and WH Freeman ( www.whfreeman.com ). Interphase. Not a part of cell division – consists of 3 stages:

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The Cell Cycle

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  1. The Cell Cycle The cell cycle. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com)

  2. Interphase Not a part of cell division – consists of 3 stages: -G1 (first growth stage) addition of biomass and size -S (synthesis) DNA replication -G2 (second growth stage) reproduction/manufacture of enough organelles for 2 cells

  3. Mitosis

  4. Mitosis The events of Prophase. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com), used with permission.

  5. Prophase The events of Prophase. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com), used with permission.

  6. Metaphase and Anaphase The events of Metaphase and Anaphase. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com),

  7. Telophase The events of Telophase. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com)

  8. Results of each… Mitosis: 2 genetically identical daughter cells that are diploid (with pairs of chromosomes) Meiosis: 4 genetically diverse daughter cells that are haploid (with half of each chromosome pair)

  9. Meiosis

  10. Chromosomes Arranged in a Karyotype Image from Access Excellence Graphics Gallery http://www.accessexcellence.com/AB/GG/mitosis.html

  11. Chromosome Structure as related to Meiosis Structure of a eukaryotic chromosome. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com) Sister chromatids = copies of the chromosomes (DNA wound around proteins) Structure and main features of a spindle apparatus. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com)

  12. Meiosis 1 Major events in Prophase I. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com)

  13. Meiosis 1 Events in prophase and metaphse I. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com) The events of Telophase I. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com)

  14. Meiosis 2 The events of Prophase II. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com) The events of Metaphase II and Anaphase II. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com),

  15. Meiosis 2 The events of Telophase II. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com)

  16. Sources of VariationCrossing overIndependent assortment of chromosomesSegregation of allele pairs (genes) Crossing-over between homologous chromosomes produces chromosomes with new associations of genes and alleles. Image from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com)

  17. Comparison of Mitosis and Meiosis Image from Access Excellence Graphic Gallery http://www.accessexcellence.com/AB/GG/comparison.html

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