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

ChromatinChromosomes 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 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 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…

INTERPHASE Click on the picture below that shows INTERPHASE?

INTERPHASE What 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

PROPHASE Click on the picture below that shows PROPHASE?

PROPHASE What 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! INTERPHASEPROPHASE Cell grows and DNA replicates Chromosomes visible, spindle fibers form, nuclear membrane disappears.

METAPHASE Click on the picture below that shows METAPHASE?

METAPHASE What 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! INTERPHASEPROPHASEMETAPHASE Cell grows and DNA replicates Chromosomes visible, spindle fibers form, nuclear membrane disappears. Chromosomes line up in the middle of the cell.

ANAPHASE Click on the picture below that shows ANAPHASE?

ANAPHASE What 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! INTERPHASEPROPHASEMETAPHASEANAPHASE 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.

TELOPHASE Click on the picture below that shows TELOPHASE?

TELOPHASE What 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! INTERPHASEPROPHASEMETAPHASEANAPHASETELOPHASE 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? INTERPHASEPROPHASEMETAPHASEANAPHASETELOPHASE CHROMATIN CHROMOSOME CHROMATIN