Cell Division

• What are the type of cells that cannot be divided

  Mature nerve cells
• Which cells in the body continually divide

  Skin cells

  Blood cells
• WHat is the purpose of continuous skin cell division

  For wound repair
• What are the 2 types fo cell division

  MITOSIS

  MEIOSIS
• Cell division for growth and repair

  MITOSIS
• Cell division for reproduction

  MEIOSIS
• Each half of a double stranded chromosome is called

  Chromatid
• Before a cell divides into 2 new cells, it must duplicate its genetic material

  MITOSIS
• Stage of MITOSIS

  Interphase

  Prophase

  Metaphase

  Anaphase

  Telophase
• The process of nuclear division resulting in two identical daughter cells

  MITOSIS
• Are chromosomes visible during interphase?

  No
• What happens to chromosome during interphase?

  Each one is copied
• What else is bein produced during interphase

  Organelles to support two new cells
• What structures begin to form during prophase

  Spindle fibers
• What happens to the nuclear membrane ad nucleolus

  They start to disappear
• How do chromosomes appear in prophase

  Threadlike then condense from double stranded chromosomes
• Where do chromosomes positions themselves during metaphase

  The cell's equator
• What connects to the spindle during this phase

  The centromeres
• What happens to centromeres in anaphase

  They split
• How do chromosome strands move

  One half moves to each end led by centromeres
• What happens to the cytoplasm during anaphase

  It begins to divide
• By late anaphase where are the chromosomes

  At the poles of the cell
• What happens to the chromosomes during telophase

  They fade from view
• What cellular structures reform in telophase

  Nuclear membrane and nucleoli
• What happens to the spindle in telophase

  Disappears
• What forms in each cells in telophase

  a second centriole
• What is the end result of the telophase

  Two cells identical to the parent cell
• Type of cell division that produces two genetically identical daughter cells

  MITOSIS
• What is the key characteristic of cells produced by this process?

  Genetically identical to parent cell
• Structure contain DNA that carries genetic information

  Chromosomes
• Having two complete sets of chromosomes

  Diploid
• Having one set of chromosomes

  Haploid
• How many chromosomes are in human haploid cells

  23
• What type of cells are haploid

  egg and sperm cells
• What process form these cells

  MEIOSIS
• Type of cell division that produces gametes with half the number of chromosomes

  MEIOSIS
• How many times does nuclear and cytoplasmic division occur

  Twice
• What happens to chromosome pairs in first division

  They become single chromosomes
• What happens to chromosome in second division

  Double stranded chromosomes become single stranded
• What process during prophase causes genetic differences

  Crossing over