Chapter 9 Lecture Notes

Chapter 9-1
All Cell come from Cells

Define Key Terms

Asexual Reproduction

Sexual Reprodcution

Read:

Repair and Cell growth and Figure 9-1

Reproduction and Figure 9-2

Assessment:

Complete Concept Check questions

Answer all questions in a complete sentence

You may answer on the same sheet of paper as your vocabulary.

We will go over answers together in class.

Chapter 9-2
The Cell Cycle Multiplies Cells

Define Key Terms

Chromatin

Chromosomes

Sister Chromatid

Centromere

Cell Cycle

Interphase

Mitotic phase

Mitosis

Cytokinesis

Chromosomes and Cell division

Almost all genes of a Eukaryotic cell are located in the cell nucleus.

Genetic materials exists in long thin strands too small to be seen.

These fibers consist of chromatin, which is a combination of DNA and Protein molecules.

See Figure 9-3

The number of chromosomes an organism has varies. For example, humans have ________ also know as _________ pairs.

Before cell division a cell duplicates it chromosomes. One copy stays with the original cell and the second copy for the new cell created.

Each Chromosome consists of two identical copies called Sister chromatids

The Region where two chromatids are joined tightly is called a centromere.

See figure 9-4

The Cell Cycle

When Eukaryotic Cells undergo the orderly sequence of divsion it is called the Cell Cycle

Interphase the stage in which a cell carries out its metabolic processes and performs its functions. The cell spends up to 90% of its time in Interphase.

Summerize the Cell Cycle:

S-stage:___________________________________________________________________________________

G2-stage:__________________________________________________________________________________

M-stage:___________________________________________________________________________________

G1-stage:____________________________________________________________________________________

Mitotic Phase

The stage of the cell cycle when the cell is acutally dividing is called the Mitotic phase.

The Mitotic phase includes 2 processes: Mitosis & Cytokinesis'

The stages of Mitosis are: Prophase, Metaphase, Anaphase and Telophase (P.M.A.T.)

Assessment:

Complete Concept Check questions

Answer all questions in a complete sentence

You may answer on the same sheet of paper as your vocabulary.

We will go over answers together in class

Chapter 9-3

Cells divide during the Mitotic Phase

Complete Mitosis Activity Handout

Define Key Terms

Spindle

Centromere

Cell Plate

On the same sheet of paper answer the concept check question in complete sentences. We will go over the answers in class together