meiosis

• meiosis products

  • 4 genetically different
  • haploid cells
• prophase 1


  • chromosome condense. now visible
  • homologous ones join + form bivalents
  • crossing over occurs in chiasma
• metaphase 1

  • bivalents line up at equator
  • independant assortment occurs
• anaphase 1

  • bivalents seperate
  • homologous chromosomes move to opposite poles
• telophase + cytoken 1

  • 2 nuclei are replicated
  • chromosomes don't uncoil
  • cells divide into 2
• prophase 2

  • centrioles move and form new poles (90 from original)
  • chromosomes are already coiled
• metaphase 2

  • chromosomes line up at the new equator
• anaphase 2

  • centromeres split
  • chromosomes seperate
  • chromatids move to opposite poles
• telophase + cytoken 2

  • nuclear envelope form around chromosome
  • cells divide
  • form tetrad