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MITOSIS
ONE CELL “PARENT”
TWO NEW IDENTICAL CELLS
“DAUGHTER CELLS”
INTERPHASE• G1 Phase = Growth of Cell• S Phase = DNA Replicates• G2 Phase = Cell Grows Again DNA is in
CHROMATIN form!
DNA = Chromatin
DNA
ONE DNA Molecule
TWO DNA Molecules =
Replicated DNA
CELL DIVISION•MITOSIS–DNA & Nucleus divides
•CYTOKINESIS–Cytoplasm divides
MITOSIS• DNA & Nucleus divides
• PROPHASE• METAPHASE• ANAPHASE• TELOPHASE
Chromatin Chromosomes
PROPHASE
• Replicated DNA - Chromatin thickens and is now known as Chromosomes.
• Chromosomes become visible (able to see)
• The nuclear membrane disappears
• Spindle fibers form
METPHASE
• The chromosomes line up in the middle of the cell.
• Chromosomes are attached to the spindle fibers.
• “M”etphase = “m”iddle
Replicated DNA = CHROMOSOMES
Centrioles
ANAPHASE
• Spindle fibers pull the chromosomes apart and drag them to opposite sides of the cell.
• Sister chromatids apart• The replicated DNA
molecules are now split.
Replicated DNA = PULLED APART
Sister
Chromatids
TELOPHASE
• Chromosomes uncoil back to CHROMATIN.
• Nuclear membranes reform in both sides.
• Spindle fibers disappear.
DNA BACK TO = CHROMATIN
Chromatin Chromatin
Nuclear Membrane
Nuclear Membrane
CYTOKINESIS
Cytoplasm divides = actual cells split into two new identical cells!
CYTOKINESIS – ANIMAL CELL
• In animal cells,A Cleavage Furrow develops and splits the two new cells apart. Chromatin Chromatin
Cleavage Furrow
CYTOKINESIS – PLANT CELL
• In plant cells,A CELL PLATE develops and splits the two new cells apart.
DNA BACK TO = CHROMATIN
NOW YOU TRY…
INTERPHASEClick on the picture below that shows INTERPHASE?
INTERPHASEWhat happens in INTERPHASE? Click on correct step.
Cell grows and DNA replicates
Chromosomes visible, spindle fibers form, nuclear membrane disappears.
Chromosomes line up in the middle of the cell.
Chromosomes are pulled apart by the spindle fibers and sister chromatids
move to opposite ends.
Chromosomes uncoil back to chromatin, spindle fibers disappear,
two new nuclear membranes appear.
CORRECT!
INTERPHASE
Cell grows and DNA replicates
PROPHASEClick on the picture below that shows PROPHASE?
PROPHASEWhat happens in PROPHASE? Click on correct step.
Cell grows and DNA replicates
Chromosomes visible, spindle fibers form, nuclear membrane disappears.
Chromosomes line up in the middle of the cell.
Chromosomes are pulled apart by the spindle fibers and sister chromatids
move to opposite ends.
Chromosomes uncoil back to chromatin, spindle fibers disappear,
two new nuclear membranes appear.
CORRECT!
INTERPHASE PROPHASE
Cell grows and DNA replicates
Chromosomes visible, spindle fibers form, nuclear membrane disappears.
METAPHASEClick on the picture below that shows METAPHASE?
METAPHASEWhat happens in METAPHASE? Click on correct step.
Cell grows and DNA replicates
Chromosomes visible, spindle fibers form, nuclear membrane disappears.
Chromosomes line up in the middle of the cell.
Chromosomes are pulled apart by the spindle fibers and sister chromatids
move to opposite ends.
Chromosomes uncoil back to chromatin, spindle fibers disappear,
two new nuclear membranes appear.
CORRECT!
INTERPHASE PROPHASE METAPHASE
Cell grows and DNA replicates
Chromosomes visible, spindle
fibers form, nuclear
membrane disappears.
Chromosomes line up in
the middle of the cell.
ANAPHASEClick on the picture below that shows ANAPHASE?
ANAPHASEWhat happens in ANAPHASE? Click on correct step.
Cell grows and DNA replicates
Chromosomes visible, spindle fibers form, nuclear membrane disappears.
Chromosomes line up in the middle of the cell.
Chromosomes are pulled apart by the spindle fibers and sister chromatids
move to opposite ends.
Chromosomes uncoil back to chromatin, spindle fibers disappear,
two new nuclear membranes appear.
CORRECT!
INTERPHASE PROPHASE METAPHASE ANAPHASE
Cell grows and DNA replicates
Chromosomes visible, spindle
fibers form, nuclear
membrane disappears.
Chromosomes line up in
the middle of the cell.
Chromosomes are pulled apart by
the spindle fibers and sister
chromatids move to opposite ends.
TELOPHASEClick on the picture below that shows TELOPHASE?
TELOPHASEWhat happens in TELOPHASE? Click on correct step.
Cell grows and DNA replicates
Chromosomes visible, spindle fibers form, nuclear membrane disappears.
Chromosomes line up in the middle of the cell.
Chromosomes are pulled apart by the spindle fibers and sister chromatids
move to opposite ends.
Chromosomes uncoil back to chromatin, spindle fibers disappear,
two new nuclear membranes appear.
CORRECT!
INTERPHASE PROPHASE METAPHASE ANAPHASE TELOPHASE
Chromosomes uncoil back to
chromatin, spindle fibers
disappear, two new nuclear membranes
appear.
Cell grows and DNA replicates
Chromosomes visible, spindle
fibers form, nuclear
membrane disappears.
Chromosomes line up in
the middle of the cell.
Chromosomes are pulled apart by
the spindle fibers and sister
chromatids move to opposite ends.
CHROMATIN OR CHROMOSOME?
INTERPHASE PROPHASE METAPHASE ANAPHASE TELOPHASE
CHROMATIN
CHROMATIN
CHROMOSOME
CHROMOSOME CHROMOSOME
CHROMOSOME
CHROMATIN