Chromosomes and Mitosis/Meiosis

• The nucleus contain genetic material
• Chromosomes are coiled up lengths of DNA molecules
• In sexual reproduction, a male gamete fuses with a female gamete.
• male and female gametes fuse, their genetic information mixes
• mixing leads to variation in the offspring produced, so all the offspring are different.
• Describe three differences between the processes of mitosis and meiosis?


  Mitosis produces 2 daughter cells

  Meiosis produces 4 daughter cells

  
  

  One cell division in mitosis two in meiosis

  
  

  Mitosis produces genetically identical but meiosis produces genetically different cells
• Describe the stages of the cell cycle?

  Stage 1

  Chromosomes replicate

  mitochondria and chromosomes replicate

  Stage 2

  one set of chromosomes is pulled to each end of the cell

  Stage 3

  Cytoplasm and cell membrane divide to form to new cells