Chromosomes and Mitosis

• What is the name for coiled up DNA molecules?

  Chromosomes
• Where are chromosomes in the cell?

  The nucleus
• What do chromosomes contain?

  Genes
• How many copies of each chromosome does a cell contain?

  Two
• How many pairs of chromosomes are in a human body?

  23
• How many chromosomes are in a human body?

  46
• What is mitosis?

  The stage of the cell cycle where the cell divides
• What is mitosis used for?

  Growth or replacing damaged cells
• How many cells are produced by mitosis?

  Two
• What happens to DNA in the nucleus during mitosis?

  • It usually exists as long strings
  • It forms into chromosomes
  • It duplicates itself and forms X shaped chromosomes
• What happens to a cell during mitosis?

  • It grows and creates new subcellular structures
  • Chromosomes line up at the centre of the cell
  • Cell fibres pull chromosomes apart to opposite sides of the cell
  • Membranes form around both sets of chromosomes- becoming nuclei
  • The cytoplasm and cell membrane divide
• What do you call two cells produced by mitosis?

  Daughter cells
• Are two daughter cells produced by mitosis identical?

  Yes