“Cell division is part of the cell cycle” Section 3.2 “Cell division is part of the cell cycle”

Do Now C A B Label the following diagram 1- chromosome 2- chromatid 3- centromere C A B

Objectives Describe the main events of the cell cycle Differentiate interphase from mitosis Construct a cell cycle model from paper plates.

Cell Cycle “normal sequence of development and division of a cell” Contains 2 parts for eukaryotes Interphase M-phase (Mitosis)

Interphase There is no division in interphase, just growth. G1: organelles duplicate, cell grows S: DNA replicates (is copied) G3: cell grows, prepares to divide

M-phase (Mitosis Mitosis= “nuclear division” PMAT+ C Prophase Metaphase Anaphase Telophase Cyokinesis

Plate Models You are now going to make a study tool using paper plates. Follow along while I show you how to fold the plate, use the directions as a guide. Pass out plates

Mitosis Creates 2 genetically IDENTICAL daughter cells.

Prophase DNA condenses to form chromosomes. The nucleus dissapears.

Metaphase Chromosomes line up in the middle of the cell at the “equator”

Anaphase Chromatids split Pulled to opposite sides of the cell

Telophase 2 nuclei form Nuclear membrane forms around each group of chromosomes. The chromosomes become chromatin again.

Cytokinesis Division of the cytoplasm. Occurs differently in plant and animal cells. 2 new daughter cells form.

Cytokinesis Animal Cells: Membrane pinches together and forms a cleavage furrow until the cells separate.

Cytokinesis Plant Cells: Cell plate forms which becomes the cell wall and divides the two cells.