Chapter 10: Cell Growth and Division

Chapter 10: Cell Growth and Division

Section 10-1: Cell Growth

How do living things grow?

Limits to Cell Growth

Cells can only grow so big for two reasons:

1. DNA Overload:

· Example: A library has only a certain number of books. If a town doubles or triples in population, there wouldn’t be enough books for everyone.

2. Exchanging materials:

Ratio of Surface Area to Volume

Area = L x W x 6 sides

Volume = L x W x H

1 cm 2 cm 4 cm

A = cm2 A = cm2 A = cm2

V = cm3 V = cm3 V = cm3

Surface Area / Volume =

Section 10-2: Cell Division

Cell Division

· Cell division –

Chromosomes

· Chromosome =

· Cells (with one exception)

· When a cell is preparing to divide,

The Cell Cycle

· Cell Cycle –

· Phases of the cell cycle:

• G1 phase –

• S phase – Interphase

• G2 phase –

• M phase – Mitosis –

§ Prophase

§ Metaphase

§ Anaphase

§ Teleophase

Cytokinesis –

Interphase – G1, S, and G2

· Interphase =

Purpose and Results of Mitosis and Cell Division

· Purpose –

· Results –

Prophase

Metaphase

Anaphase

Telophase

Cytokinesis

Section 10-3: Regulating the Cell Cycle

Controls on Cell Division

Uncontrolled Cell Growth

· Cancer –

cancer normal

Section 11-4: Meiosis

Diploid and Haploid Cells

· Diploid (2n) –

o Example:

· Haploid (n) –

o Example:

Why are reproductive cells haploid?

Meiosis

· Meiosis –

Crossing Over

· Crossing over –

· Result:

Mitosis / Meiosis
Purpose for Organism
Number of Cells Produced
Chromosome Number (diploid or haploid)
Genetic Relationship to Original Cell
Type of Cells Produced