Biology11/26/13

Did you finish and turn in your osmosis (gummy bear or egg) lab report? You will not pass the 9 weeks without it.

2nd, 5th, 7th Mitosis – The what, how, and why

3rd, 4th MitosisCancer & how it happensMitosis Quick Lab

The Cell Cycle

Interphase• G1 – 1st growth phase• S – synthesis (copying) of DNA• G2 – 2nd growth phase

• The cell grows and copiesits DNA in preparation fordividing.

Prophase• The DNA condenses

into chromosomes.• The centrioles start to

build the spindle.

Metaphase• The spindle fibers line

the chromosomes upin the middle of the cell on the metaphaseplate.

Anaphase• The centrioles start to

reel in the spindle,pulling the chromosomesapart and sending halfof them to each side of the cell.

Telophase• Chromosomes begin

to uncoil and return tochromatin.

• Membrane begins to form around the new nucleus.

Cytokinesis• Cell pinches in two,

dividing the cytoplasmand organelles in it evenly between the2 new cells.

Onion (Allium) Root Tip