Mitosis and Meiosis

• What is the purpose of mitosis?

  To make body cells for growth and repair
• What is the purpose of meiosis?

  making egg and sperm cells
• How many chromosomes should be produced in mitosis?

  46 (diploId)
• How many chromosomes should be released during meiosis?

  23 (haploid)
• What is a fertilised egg cell called?

  zygote
• What is mitosis?

  Mitosis is the process of cell division in which a single cell divides into two identical daughter cells.
• Are daughter cells haploid or diploid in mitosis ?

  diploid
• How many daughter cells does mitosis produce?

  2
• With a chromosome,what is the bottom called?

  chromatid
• What is the middle of a chromosome called?

  Centromere
• Are daughter cells haploid or diploid in meiosis?

  haploid
• How many daughter cells are produced during meiosis?

  4
• Are daughter cells genetically identical or different in mitosis?

  genetically identical
• Are daughter cells genetically identical or different in meiosis?

  genetically different
• Explain why sperm cells cannot be produces using the cell cycle?

  Sperm cells are produced by meiosis

  Cell cycle produces cells which are diploid

  Sperm cells are haploid
• What happens in prophase?

  Membrane of nucleus breaks down

  Spindal fibres are made

  chromosomes condense
• What happens in Metaphase?

  chromosomes line up in the middle of the cell

  spindal fibres attach to the centomere of the chromosomes
• What happens in anaphase?

  Spindal fibres contract

  chromosomes split

  chromatids are pulled to opposite poles
• What happens in telophase?

  membrane of the nucleus reforms
• what happens in cytokinesis?

  cytoplasm splits forming 2 daughter cells
• What happens in interphase?

  DNA replicates

  new organelles are made

  chromosomes are not visible
• What is sexual reproduction ?


  when the haploid egg and sperm cell fuse together to make a diploid zygote
• Is sexual reproduction mitosis or meiosis?


  meiosis
• What is aesexual reproduction ?


  when one parent cell divides to produce genetically identical offspring (clones)
• Is aesexual reproduction mitosis or meiosis?


  mitosis
• What is cancer?


  when a mutated cell divides uncontrollably by mitosis forming a lump of cells called a tumour
• What are some risk factors in cancer?

  smoking - lung cancer

  alcohol - liver cancer

  genetics

  sunlight (uv radiation) - skin cancer

  Age