Cell division by Mitosis

• 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
• Why do cells need to divide?

  To maintain a large number of cells
• What happens in the first stage of the cell cycle?

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

  The cell grows and copies internal structures
• What occurs in 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 during the final stage of the cell cycle?

  The cytoplasm and cell membrane
• What do the two identical cells at the end of mitosis contain?

  Two pairs of chromosomes
• What is the first function of mitosis?

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

  Repairs damaged tissues
• What is the third function of mitosis?

  Occurs during asexual reproduction