wed 11/20 chp.6&7 test after: chp.8 title page –due tomorrow

Wed 11/20

• Chp.6&7 Test• After: Chp.8 Title Page

– DUE tomorrow

Thur 11/21

• Grades posted– Includes Test & INB Check – Any questions/problems with INB Check see

me after notes today

***Chp.6&7 Test Retakes available before or after school till next WEDNESDAY!!!

Title page-pg.45

Ch 8 title page

In: Pg.46

1. Chromosome model• Draw the model

chromosome on your paper

• Label the following on your diagram— chromosome, chromatids, centromere

2. Why does the chromosome look so bumpy?

Centromere

Chromatids

ChromoSome

• Why do you think a chromosome looks so bumpy?

Chromosomes

• Rod-like structures made of– DNA– Proteins called histones

which help shape and pack DNA

• Each half called a chromatid– Duplicate before cell division

• Two identical parts

– Centromere holds them together

Chromosome Number

• Varies with species• Some have same

number– Carrot and lettuce = 18– Potatoes, Plums,

Chimpanzees and Gorillas = 48

Chromosome Number

• Diploid (2n) – normal cell

• Haploid (1n) – dividing cell

Chromosome Differences

• Prokaryote– Most only contain

one Chromosome– Attached to inside

of the cell membrane

– Circular DNA

• Eukaryote– Many

Chromosomes– Found inside

nucleus– Compacted to fit

inside the nucleus

Human Chromosomes

• 46 or 23 pairs• Autosomes = 44• Sex Chromosomes = 2• Pair of autosomes called

– Homologous chromosomes or homologues• Same size and shape• Different from other pairs• Have same gene locations

• Karyotype– Photomicrograph of

chromosomes dividing in normal cell

Spectral Karyotyping

Pg.47 Set up Cornell Notes

Title them: Chp.8 Cell Reproduction

How do cells reproduce?

• Cell division is the process in which cells reproduce themselves.

• Cell cycle is the stages a cell goes through to make more cells.

G1 (growth;Gap

1)

S=Synthesis

G2=Gap 2

1 hr.Cytokinesis

M phase

• Rapid cell growth

• Cell doubles in size

• Enzymes + organelles double in number

• Growth

• DNA makes a copy of itself

11 hrs.

7 hrs.• Rapid Growth

• Final preparation for cell division

3 hrs.

Interphase

Cell Division in Prokaryotes

• Binary Fission– Two identical cells

produced from one cell– Asexual reproduction

• Only 1 parent• No genetic diversity

Cell Division in Eukaryotes(m phase of cell cycle)

• Mitosis:– Occurs in organisms for

growth, development, repair or asexual reproduction

– Creates identical cells(2n)

Finish Cornell Notes

• Write 3 questions• Write 3-sentence summary

Thru 2:Pg 48-49Chp.8 3-Column Vocab

1. Chromosome

2. Histone

3. Chromatid

4. Centromere

5. Homologous chromosomes

6. Diploid

7. Haploid

8. Binary fission

9. Mitosis

10. Interphase

11. Cytokinesis

Homework

• Work on vocab DUE MONDAY!!!

OUT – pg.46

How is the cell cycle like a human life cycle?

Fri 11/22

***Chp.6&7 Test Retakes available before or after school till next WEDNESDAY!!!

Today & Monday = one big day

• Describe the phases of the cell cycle.

In: pg.50

Write down 5 facts as you watch the Cell Division video clip1. 2.3.4.5.

Pg.51 Cell Cycle

C

The cell cycle consists of…

1. Interphase2. Mitosis/Cytokinesis

Remember: IPMAT!

Pg.53 – Set up Cornell Notes(skip pg.52….for now…)

• Title: Mitosis

Mitosis:• Division in body cells

– all cells that are not gametes (reproductive cells).

• Creates 2 identical daughter cells.

• Replaces old cells, growth

• Starts as soon as the egg is fertilized and ends at death.

• Has 4 stages:– prophase, metaphase, anaphase & telophase.

Prophase

1.Chromatin condenses into chromosomes (visible)

2.Nuclear membrane dissolves

Metaphase – think “M” for Middle

1.Chromosomes line up in the middle of the cell

2.Each chromosome has been copied and has two pairs of individual chromatids

ANAPHASE – think “A” for apart

1.Chromatids move apart to the opposite ends of the cell

Telophase – think “T” for two

1.Chromosomes reach the opposite ends

2.Nuclear envelopes reform around the two sets of DNA

After Mitosis

Cytokinesis– Division into two

cells– Animal cells

• Uses cleavage furrows

– Plant cells• Uses cell plate

Finish Cornell Notes

• Write 3 questions• Write 3-sentence summary

Pg. 52 – Stages of Mitosis Diagram

• Draw figure 8-6 from pg. 156 in your text book.

• Label all the parts

Out – do tomorrow

Mon 11/25

• Review Mitosis animation & hand model• Mitosis Cloze & Event Map• Start Mitosis Modeling Activity (if time)

IN

• Review Mitosis animation & hand model

Mitosis Practice

Pg.54•Cell Cycle CLOZE passage

Pg.55• Mitosis Event

Organizer

MITOSIS

WHO?

WHEN?

WHERE? SIGNIFICANCE?

HOW?

WHY?

EVENT

Mitosis

Why?To make identical (2n) cells

How?Prophase,

Metaphase, Anaphase, and

Telophase

Significance?

Replaces cells/Growt

h/Repair

Who?Plants

Animals

When?Fertilizati

on to Death

Where?Body Cells

Homework

• Finish Mitosis CLOZE and event map

OUT – pg.50Draw the cell in interphase.

Label the following:1. Nuclear envelope2. Cell membrane3. Nucleus4. Chromatin-this is the DNA

when it is all tangled up (before it condensesinto chromosomes).

5. Centrosomes-the green things

Question:What is Chromatin?

Tues 11/26 & Wed 11/27

• Review cell cycle, mitosis hands• Mitosis Modeling Activity• Start & Finish Hexaflexagon

Objective

• Describe the phases of the cell cycle

In: pg.56

• Write down 5 facts as you watch the Mitosis video clip

• 1. • 2.• 3.• 4.• 5.

Mitosis Video Clip

Pg.57 - Stages of Mitosis Model• Use the contents of the bag to model what is happening to chromosomes

during interphase and the 4 stages of mitosis.• Practice each stage until you have it memorized…each person will be

given a stage to demonstrate for points.

Analysis Questions:1. In this activity, what represented:

– Replicated chromosomes– Sister chromatids– Nuclear envelope– Spindle fibers

2. How many chromosomes did the parent cell have?

3. Each daughter cell?

4. What was the diploid # for the cell?

5. What was the haploid # for the cell?

Mitosis HexaflexagonProcedure:

1. Cut out the hexaflexagon.

2. Place the side without the letters or vertical lines face up. Label the diamonds as shown in the picture with the names of the phases of mitosis. (Prophase, Metaphase, Anaphase, and Telophase)

3. Draw a color picture for each phase in second diamond and describe what happens in the third diamond.

4. Follow the directions for folding the hexaflexagon.

Out – pg.56

1. What is cytokinesis?

2. How would cytokinesis differ between plant and animal cells?

Wed 11/27

• Finish & Check Hexaflexagons take grade

Mon 12/2

• Chp.8 Cell Cycle & Mitosis TEST is THURSDAY!!!!

• Next INB Check is THURSDAY!!!

• Cell Cycle and Time Lab– Website activity

In: pg.58

G1 =Gap 1

S=Synthesis

G2=Gap 2

1 hr.Cytokinesis

M phase

• Rapid cell growth• Cell doubles in size• Enzymes +

organelles double in number • Growth

• DNA makes a copy of itself

11 hrs.

7 hrs.• Rapid Growth• Final

preparation for cell division 3 hrs.

Interphase

1. About how long does it take a cell to go thru the cell cycle?

2. What stage does the cell spend the most time in?

Pg.59 - The Cell Cycle and Time

• Go to the following website

http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html• Fill out the data sheet and complete graph

and questions and glue in lab sheet as a flip up.

onion root tip

Homework

• Finish the lab sheet.

Out – pg.58

• What would happen to an organism if its cells couldn’t leave interphase and undergo mitosis?

Tuesday 12/3

• Chp.8 Cell Cycle & Mitosis TEST is THURSDAY!!!!

• Next INB Check is THURSDAY!!!

Objective

• Discuss specific examples of disruptions of homeostasis.

In: pg.60

Watch the movie clip and finish the following sentences:

1. Cancer cells are different from normal cells because they…..

2. A tumor is…

3. A tumor is harmful because it…

4. Cancer is caused by…

5. Cancer can be treated by…

Pg.61- Controlling the Cell Cycle1. What does a regulatory gene do?

2. What is cancer caused by?

3. What is a mutation?

4. What is a tumor?

5. What are carcinogens?

6. Why is it difficult for scientists to study the effects of exposure to carcinogens in humans?

7. Why is smoking dangerous?

8. Why should you wear sunscreen?

9. What are 3 treatments for cancer?

10. Immunotherapy is an experimental technique for treating cancer. In this technique, the body’s immune system is boosted so that it can destroy cancerous cells. What is a possible advantage that immunotherapy may have over chemotherapy?

Homework

• Finish “Controlling the Cell Cycle” article questions

Out – pg.60

1. What are the 3 stages of interphase?

2. Some cells go into the Go phase, what do you think this means?

3. What kinds of cells do you think go into Go?

Wednesday 12/4

• INB Quiz get out half sheet, #1-10• Chp.8 Study Guide• INB Check tomorrow• Chp.8 Cell Cycle & Mitosis Test tomorrow

Chp.8 Study Guide

• DUE TOMORROW!!!!

Thursday 12/5

• Collect Study Guides• Chp.8 Cell Cycle Test today• INB Check today

After test…

• Pg.63 Title Page Chp.10–Write title of chapter from textbook–Draw 3 pictures from chp.10–Write 3 key words from chp.10–Color with at least 3 colors