PTT09DEC2014 What was the most awesome part about the Strawberry DNA extraction? What questions did the lab spark in your brain?

The Cell Cycle & Cell Division

The Cell Cycle

Animated Cycle

MITOSIS

Mitosis The process of cell division which results in the production of two daughter cells from a single parent cell. The daughter cells are identical to one another and to the original parent cell.

Mitosis can be divided into stages 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase & Cytokinesis

Interphase The cell prepares for division Animal Cell –DNA replicated –Organelles replicated –Cell increases in size Plant Cell –DNA replicated –Organelles replicated –Cell increases in size

Interphase Animal Cell Plant Cell Photographs from:

Prophase The cell prepares for nuclear division Animal Cell –Packages DNA into chromosomes Plant cell –Packages DNA into chromosomes

Prophase Animal Cell Plant Cell Photographs from:

Metaphase The cell prepares chromosomes for division Animal Cell –Chromosomes line up at the center of the cell –Spindle fibers attach from daughter cells to chromosomes at the centromere Plant Cell –Chromosomes line up at the center of the cell –Spindle fibers attach from daughter cells to chromosomes at the centromere

Metaphase Animal Cell Plant Cell Photographs from:

Anaphase The chromosomes divide Animal Cell –Spindle fibers pull chromosomes apart –½ of each chromosome (called chromotid) moves to each daughter cell Plant Cell –Spindle fibers pull chromosomes apart –½ of each chromosome (called chromotid) moves to each daughter cell

Anaphase Animal Cell Plant Cell Photographs from:

Telophase The cytoplasm divides Animal Cell –DNA spreads out –2 nuclei form –Cell membrane pinches in to form the 2 new daughter cells Plant Cell –DNA spreads out –2 nuclei form –New cell wall forms between to nuclei to form the 2 new daughter cells

Telophase Animal Cell Plant Cell Photographs from:

Mitosis Animation

PTT10DEC2014 What are the five phases of Cell Division? What happens in interphase?

Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

Starting on pg Respond to the questions on your work sheet This will be turned in at the end of the day for 10 points!

PTT11DEC What is the difference between plant and animal cell division? 2.Which “phase” does the cell spend most of its time?

Learning Goals I can model the 5 steps of mitosis in 2 ways I can explain why cells divide

Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase

String Model of Mitosis We are going to use string and paper to model Cell division!

Interphase Chillaxin’ doing cell things Copies DNA, organelles, and gets bigger

Prophase DNA condenses in to Chromosomes

Metaphase Chromosomes line up Spindles attach

Anaphase Spindles pull the chromosomes apart

Telophase/Cytokenesis The cytoplasm divides

Two Daughter Cells These are exact copies of each other

Start with the parent cell and end with two daughter cells that have the exact same DNA

Learning Goals I can model the 5 steps of mitosis in 2 ways I can explain why cells divide