Meiosis amrc

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Meiosis amrc

  1. 1. Meiosis I and IIMarc Austin Montoya
  2. 2. How Meiosis I WorksProphase I is where chromosomes becomevisible, crossing over occurs, the nucleolusdisappears, the meiotic spindle forms, and thenuclear envelope disappears.
  3. 3. Metaphase IMetaphase I is where the pairs ofchromosomes (bivalents) become aranged onthe metaphase plate and are attached to thenow fully formed meiotic spindle.
  4. 4. Anaphase IAnaphase I is where the two chromosomes ineach bivalent seperate and migrate towardopposite poles.
  5. 5. Telophase ITelophase I is where the homologouschromosome pairs reach the poles of the cell,nuclear envelopes form around them, andcytokinesis follows to produce two cells.
  6. 6. Meiosis II
  7. 7. Prophase IIProphase II is where the nuclear envelopebreaks down and the spindle apparatus forms.
  8. 8. Metaphase IIMetaphase II is where the chromosomesbecome arranged on the metaphase plate,much as the chromosomes do in mitosis, andare attached to the now fully formed spindle.
  9. 9. Anaphase IIThe centromeres separate and the sisterchromatids—now individual chromosomes—move toward the opposite poles of the cell.
  10. 10. Telophase IITelophase II is where a nuclear envelopeforms around each set of chromosomes andCytokinesis occurs, producing four daughtercells, each with a haploid set of chromosomes.

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