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Cell Reproduction Day 3

Cell Reproduction Day 3. Warm Up List the stages of mitosis in order IPMAT. Meiosis. Meiosis = Cell division that produces only haploid cells (half the number of chromosomes) Sex cells or gametes Spermatogenesis Oogenesis. Meiosis Occurs in Two Stages. Meiosis I Meiosis II

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Cell Reproduction Day 3

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  1. Cell Reproduction Day 3 Warm Up List the stages of mitosis in order IPMAT

  2. Meiosis • Meiosis = Cell division that produces only haploid cells (half the number of chromosomes) • Sex cells or gametes • Spermatogenesis • Oogenesis

  3. Meiosis Occurs in Two Stages • Meiosis I • Meiosis II • Follows the same order as MITOSIS, but it does it TWICE

  4. Meiosis I • Homologous chromosomes are separated into separate cells.

  5. Interphase I • Cell doubles its DNA and then doubles it again http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/meiosis1.html

  6. Prophase I • Chromosomes form • Crossing over takes place http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/meiosis3.html

  7. Crossing Over • Exchanging corresponding segments of DNA • Important because it gives a new combination of genes.

  8. Crossing Over http://waynesword.palomar.edu/images/cross3.jpg

  9. Metaphase I • Chromosomes line up in the middle. http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/meiosis4.html

  10. Anaphase I • Chromosomes separate http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/meiosis5.html

  11. Telophase I • Cell begins to divide & 2 new cells form (cytokinesis) • Each cell has chromosomes http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis6.html

  12. Meiosis II • Chromatids of each chromosome are separated into separate cells http://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Meiosis_II.html

  13. Prophase II • Chromosomes form in both cells http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis7.html

  14. Metaphase II • Chromosomes line up along middle of cell http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis8.html

  15. Anaphase II • Chromosomes separate and are pulled apart into chromatids http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis9.html

  16. http://www.scq.ubc.ca/filter/wp-content/uploads/2007/10/sister-chromatid.gifhttp://www.scq.ubc.ca/filter/wp-content/uploads/2007/10/sister-chromatid.gif

  17. Telophase II • Chromatids gather at ends of cells • Cytokinesis occurs – (cell splits apart) http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis10.html

  18. End Result of Meiosis & Cytokinesis • 4 new cells each with half as much genetic info as the parent http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis10.html

  19. http://www.cellsalive.com/meiosis.htm

  20. Spermatogenesis http://www.soc.ucsb.edu/sexinfo/images/12-06-spermatogenesis.gif

  21. Oogenesis http://img.sparknotes.com/content/testprep/bookimgs/sat2/biology/0003/oogenesis.gif

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