Cell division by Mitosis

• What is the main topic of the video on three size lessons.com?


  The importance of mitosis
• By the end of the video, what should you be able to describe?

  The importance and stages of mitosis
• What do both plant and animal cells contain?

  A nucleus
• What are chromosomes made of?

  The molecule DNA
• How many of each chromosome do body cells 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 purpose of the cell cycle?

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

  Mitosis or meiosis
• What happens in the first stage of the cell cycle?

  DNA replicates to form two copies
• What else occurs during the first stage of the cell cycle?

  The cell grows and copies internal structures
• What happens during the second stage of the cell cycle?

  Mitosis takes place
• What is pulled to each end of the cell during mitosis?

  One set of chromosomes
• What divides during the final stage of the cell cycle?

  The cytoplasm and cell membrane
• How many identical cells are formed at the end of mitosis?

  Two identical cells
• What do the two identical cells contain after mitosis?

  Each with two pairs of chromosomes
• What might you see in certain textbooks regarding mitosis?

  Different stages of mitosis
• What is the first function of mitosis?

  Essential for growth and development
• What is the second function of mitosis?

  Repairs the organism, like healing bones
• What is the third function of mitosis?

  Occurs during asexual reproduction
• What are the stages of the cell cycle involving mitosis?

  1. DNA replication: forms two copies of each chromosome
  2. Mitosis: one set of chromosomes pulled to each end
  3. Cytoplasm and cell membrane divide: forms two identical cells
• What are the functions of mitosis?

  • Essential for growth and development of multicellular organisms
  • Repairs the organism (e.g., healing bones)
  • Occurs during asexual reproduction