Cell Division by Mitosis

• What are chromosomes made of?

  The molecule DNA
• How are body cells' chromosomes organized?

  They contain two of each chromosome
• How many pairs of chromosomes do human body cells contain?

  23 pairs of chromosomes
• What are gametes in terms of chromosomes?

  They have unpaired chromosomes
• What do chromosomes carry that determines features?

  A large number of genes
• What is the significance of cells being able to divide?

  It allows for growth and repair
• What are the two ways cells can divide?

  Mitosis and meiosis
• What does the cell cycle consist of?

  Three main stages including mitosis
• What happens in the first stage of the cell cycle?

  The DNA replicates to form copies
• What does the cell do during the first stage of the cell cycle besides DNA replication?

  It grows and copies internal structures
• What occurs during the second stage of the cell cycle?

  Mitosis takes place
• What happens to the chromosomes during mitosis?

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

  The cytoplasm and cell membrane
• What is the result of the cell cycle at the end?

  Two identical cells are formed
• What is one function of mitosis?

  Essential for growth and development
• When does mitosis occur in multicellular organisms?

  During growth and repair
• What is an example of mitosis in action?

  When a broken bone heals
• What role does mitosis play in asexual reproduction?

  It allows organisms to reproduce without sex
• What are the stages of the cell cycle involving mitosis?

  1. DNA replication
  2. Mitosis
  3. Cytoplasm and cell membrane division
• What is the structure of chromosomes?

  • Made of DNA
  • Carry genes that determine features
  • Human chromosomes typically contain hundreds of genes
• What is the difference between body cells and gametes?

  • Body cells have paired chromosomes
  • Gametes have unpaired chromosomes