Cell Growth

Living things grow because they _____

more and more _____

Reasons to Reproduce

•_____ dead cells•________•Cells too ______

Why is Size a Prob?•Hard to get

nutrients in•Hard to excrete

waste

3cm

2cm

1cm

Rates Of Growth•Fast Cells–_____–_____– Hair

Slow Cells•Brain•______•_______•_______

Bacteria•Will reproduce within 20 minutes

•How many is that for 1 day if you start with just one?

Uncontrolled Growth

______

_______•Tumor- •cells are dysfunctional•not deadly

Malignant•Deadly•Spreads to other tissues, Called _______

Causes of Cancer

• _________• Mutagens

• Types: Carcinomas, sarcomas, Lymphomas

Leukemia

MitosisAnd you…

Mitosis•Process where nucleus divides into _ nuclei with same # and kinds of __________ as the parent

Cytokinesis•Process where ______ divides forming two cells

Chromosomes

•Hold DNA

•Made of _______

Chromatin

•Made of -

DNA & _______(uncoiled)

Chromosome Parts•Chromatids–Coiled DNA

•__________–Middle area

Cell Cycle

Life cycle of the cell from birth to next generation

Karyotype

DiploidCells

HaploidCells

22

__________

• Pairs of chromosomes one from each parent coding for the same gene

•Interphase•Prophase•Metaphase•Anaphase•Telophase

InterphasePMAT

Interphase•Period of Cell ______ G1

•DNA is ______ S•Prepares for split G2

Animal Cell _______

Plant Cell Interphase

IProphaseMAT

Prophase•Preparation time•_________ Visible•Centrioles opposite end•________ fibers form

Animal Cell Prophase

Plant Cell Prophase

IPMetaphaseAT

Metaphase•__________ line up and meet in the middle

Plant Cell

IPMAnaphaseT

Anaphase•Chromatids ______ apart

Plant Cell

IPMATelophase

Telophase•Chromatids _______•Nuclear Envelope reforms

Plant Cell

Cytokinesis•______ forms•_________ splits•2 cells formed

CytokinesisFurrow

Cytokinesis•In _______-–Cytoplasm pinches in two

Cytokinesis•In Plants-–Cell _____ forms; then the cell wall

THEEND