The Cell Cycle

Why do cells divide? - Density Dependent Inhibition - - : - Obtaining - : - Obtaining - Ridding themselves of -

Mathematical Proof: Surface Area Volume cm2 cm3 Compare: Surface Area = 1x6(9) = 54 = Volume 3x3x3 27 Surface Area = 1x6 = Volume 1x1x1 _______ surface area per unit of volume ______ surface area per unit of volume

Cell Cycle Mitosis:_________ Interphase: __________ So cells divide to stay small and efficient. Let’s look at their life cycle: G Phases = intense S Phases = How long does this all take? ___________division and separation Skin cells – Digestive – Nerves – Mitosis:_________ Interphase: __________

Chromosome Changes During Cell Cycle ___________ Sister _________ joined by a ___________ Chromosomes headed for 2 separate ___________

Cell Division Cell Division occurs in two ways: - produces genetically _______ daughter cells produces genetically ________offspring

Mitosis Occurs in 4 (5) stages: P________ M_______ A________ T________ (____________) Describe _______ involving ___ Describes _________ involving __________________________

Interphase - - (animal cells only) Animal Cell Plant Cell

Prophase - - (animal cells only) Animal Cell Plant Cell Early Late

Metaphase - - (animal cells only) Animal Cell Plant Cell

Anaphase - Animal Cells = “ ” Plant Cells = Animal Cell Plant Cell

Telophase - Animal Cells = Plant Cells = Animal Cell Plant Cell Early Late

Cytokinesis - Animal Cell Plant Cell