ptt09dec2014 what was the most awesome part about the strawberry dna extraction? what questions did...

PTT 09DEC2014

• 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

http://www.nobel.se/medicine/laureates/2001/press.html

Animated Cycle

http://www.cellsalive.com/cell_cycle.htm

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

InterphaseThe 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: http://www.bioweb.uncc.edu/biol1110/Stages.htm

ProphaseThe cell prepares for nuclear division

• Animal Cell– Packages DNA into

chromosomes

• Plant cell– Packages DNA into

chromosomes

Prophase

Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

MetaphaseThe 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: http://www.bioweb.uncc.edu/biol1110/Stages.htm

AnaphaseThe 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: http://www.bioweb.uncc.edu/biol1110/Stages.htm

TelophaseThe 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: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Mitosis Animation

http://www.cellsalive.com/mitosis.htm

PTT 10DEC2014

• What are the five phases of Cell Division?

• What happens in interphase?

Animal Mitosis -- Review

Interphase

Prophase

Metaphase

Anaphase

Telophase

Interphase

Plant Mitosis -- ReviewInterphase

Prophase

Metaphase

Anaphase

Telophase

Interphase

Starting on pg 96-100

• Respond to the questions on your work sheet

• This will be turned in at the end of the day for 10 points!

PTT 11DEC2014

1. 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 -- ReviewInterphase

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