Topic: Reproduction

Aim: Describe the processes of asexual reproduction and mitosis.

Do Now: Take out your repro reading notes.

With your 12 o’clock partner, discuss #’s 1 – 3 from your Repro ISN and the immune system questions on the next slide

(YOU HAVE 4 MINUTES)

HW: Meiosis Reading Notes due Friday.

CL Skeletal and Muscular due tomorrow.

Immune System due Friday

Immunity Review

1.Why is active immunity long term?

2.Identify the two ways you can get active immunity to a disease.

3.Identify the immune system disorder being described:

a. It weakens the immune system so that the person can no longer fight pathogens

b. The body attacks your own body cells

c. Cells divide uncontrollably

d. The body reacts to a harmless substance.

Where is DNA found in a cell?•In the nucleus•Chromosomes:

–Made of genes DNA

gene

1. How many cells are produced as a result of mitosis?

• 2 cells

2. Identify the name of the new cells produced as a result of mitosis.

• Daughter cells

daughter cells

3. Compare the two new cells produced.

• Identical copies• Same genetic code• Same # of chromosomes

50

50 50

4. If the original cell consists of 46 chromosomes, how many will be found in the daughter cells.

• 46

46

46 46

5. Identify the 5 phases of mitosis.

• Interphase• Prophase• Metaphase• Anaphase• Telophase

6. Identify the main event that occurs during interphase.

• Duplicating chromosomes

chromatid

centromere

centromere

chromatid

1 chromatid 2 chromatids

http://www.baileybio.com/plogger/images/biology/powerpoint_-_cell_growth___division/interphase.jpg

7. Identify 3 events that occur during prophase.

• Centrioles get to right position• Spindle fibers form• Nuclear membrane breaks down

centrioles

Spindle fibers

8. Identify the main event that occurs during metaphase.

• Chromosomes line up along central axis.

• Spindle fibers attach to centromeres.

Chromosomes

Spindle fibers

Centrioles

10. Identify the main event that occurs during anaphase.

• Chromatids pulled to each end.

What are the spindle fibers attached to????

Chromosome

Spindle fibers

11. Describe the 2 events that occur during telophase.

• Nuclear membrane reforms• Cytokinesis – cell membrane

“pinches in” to split cell into 2 pieces

Cytokinesis

• Plant cells: cell plate forms

http://micro.magnet.fsu.edu/micro/gallery/mitosis/mitosis.html

Interphase

Chromosomes replicating

Prophase

Nuclear membrane breaks down, spindle fibers form, centrioles move to opposite poles

Metaphase

Chromosomes line up in the middle

Anaphase

Chromatids pull apart and move to opposite poles.

Telophase

Nuclear membrane reforms and cytokinesis occurs.

Interphase

Chromosomes replicating

Daughter cells are genetically identical to each other and parent cell.(same # of chromosomes)

http://www.baileybio.com/plogger/images/biology/powerpoint_-_cell_growth___division/interphase.jpg

Mitosis – bone cells

Parent cell Prophase Metaphase

TelophaseAnaphase

Rat – epithelial cells

REMEMBER!REMEMBER!

IInterphase

PProphase

MMetaphase

AAnaphase

TTelophasehttp://www.youtube.com/watch?v=PQyAXiH5RrI

IPMAIPMATT

Let’s Review!

1.Describe where chromosomes are found and what they are made up of.

2.Describe 2 characteristics of asexual reproduction.

3.Describe what occurs at each phase of mitosis.

Infectious diseases are caused by

1. deficiencies in the diet

2. allergies

3. microscopic organisms that can be transmitted from one organism to another

4. malfunctioning organs

A person with AIDS is likely to develop infectious diseases because the virus that causes AIDS

1. destroys cancerous cells

2. damages the immune system

3. increases the rate of antibody production

4. increases the rate of microbe destruction

In some individuals, the immune system attacks substances that are usually harmless, resulting in

1. an allergic reaction

2. a form of cancer

3. an insulin imbalance

4. a mutation

Uncontrolled cell division is known as

1.allergies

2.cancer

3.AIDS

4.infectious

The type of immunity in which antibodies and memory cells are produced is called

1.temporary immunity

2.active immunity

3.passive immunity

4.long-term immunity

1 & 2: interphase3,4,& 5: prophase6:metaphase7 & 8: anaphase9 & 10: telophase (& cytokinesis)

http://www.youtube.com/watch?v=Y6j36p3s8ts&feature=player_embedded#at=33