cell division by mitosis

• What do both plant and animal cells contain?

  A nucleus
• What are chromosomes made of?

  The molecule DNA
• How many chromosomes does the cell mentioned in the video contain?

  Four chromosomes
• How many pairs of chromosomes do human body cells contain?

  23 pairs of chromosomes
• What type of cells have chromosomes that are not paired?

  Gametes
• What do chromosomes carry that determines many of our features?

  A large number of genes
• How many genes do the chromosomes in the video have?

  Four genes
• What is the purpose of the cell cycle?

  Cells must be able to divide
• What are the two ways cells can divide?

  Mitosis and meiosis
• What is the first stage of the cell cycle?

  The DNA replicates to form two copies of each chromosome
• What happens to the cell during the first stage of the cell cycle besides DNA replication?

  The cell grows and copies its internal structures
• What is the second stage of the cell cycle?

  Mitosis takes place
• What happens during mitosis?

  One set of chromosomes is pulled to each end of the cell
• What divides in the final stage of the cell cycle?

  The cytoplasm and the cell membrane
• What do we end up with at the end of the cell cycle?

  Two identical cells
• How many stages of mitosis do students need to know for the AQ exams?

  The stages shown in the video
• What are the functions of mitosis?

  • Essential for growth and development of multicellular organisms
  • Repairs damaged tissues (e.g., healing a broken bone)
  • Occurs during asexual reproduction
• What is a key fact about mitosis?

  Mitosis copies one cell into two
• What type of organisms undergo mitosis?

  Multicellular organisms