Transcript 3.2 Powerpoint

Section 3.2
“Cell division is part of the cell
cycle”
Do Now
• On a separate piece of paper, please answer the
following questions.
• 1. Write another name for cellular division.
• 2. List two reasons why cells divide.
• 3. Volume: Cytoplasm :: Surface Area :________
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
copy, cell grows
– S: DNA replicates
(is copied)
– G2: 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
Do Now – Label the Cell Cycle
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.
• Do Now
Label the
parts of
mitosis
Let’s review mitosis…
• http://highered.mcgrawhill.com/sites/0072437316/student_view0/
chapter11/animations.html
Think-pair-share
• Try to label the parts of cell division.