1. Write in complete sentences! Don’t talk during the Catalyst!
Mitosis
Write in complete sentences!
Don’t talk during the Catalyst!
Catalyst
How many cells do you think you started out as? Why do you think that?
If I had a recipe and I wanted to give it to my brother in New York, how could I make sure that both of us have it?

2. HOMEWORK: Mitosis Worksheet
Agenda
Catalyst
HW Review
Mitosis – MiTWOsis?
BRAIN GAIN
Practice EQ
HOMEWORK: Mitosis Worksheet

3. 19. Compare photosynthesis and cellular respiration
19. Compare photosynthesis and cellular respiration. (Compare means to “Identify how they are the same.”)
20. Contrast photosynthesis and cellular respiration. (Contrast means to “Identify how they are different.”)
21. Which cellular process produces ATP?
22. What would happen if the sun stopped shining tomorrow? Answer in terms of ATP, photosynthesis, and cellular respiration. (Use these vocabulary words!)
23. Photosynthesis produces glucose, which stores energy. Why is it important that cellular respiration transforms glucose into ATP?

4. SUN ATP! Why do we need the sun? Glucose CELLULAR RESPIRATION
SOLAR ENERGY
CHEMICAL ENERGY
CHEMICAL ENERGY
CELLULAR RESPIRATION
PHOTOSYNTHESIS

5. HW Review glucose ATP sunlight chemical chemical photosynthesis
cellular respiration
mitochondria
plant

6. By the end of today, SWBAT…
Objectives
By the end of today, SWBAT…
Describe the purpose and basic process of mitosis
Explain the role of DNA and chromosomes in mitosis
This one may be a doozy.

7. Reproduction Key Point #1: There are two types of reproduction.
Asexual reproduction  one parent, all identical children
Sexual reproduction  two parents, children are different

8. So, why do our cells need to reproduce?

9. Getting Big Two types of cells:
Key Point #1: Multicellular organisms get bigger because they make more somatic cells.
Two types of cells:
Somatic cells = your body cells (like liver, brain, blood, etc.)
Sex cells = sperm and egg cells

10. Humans are filled with cells like this beaker is filled with Skittles
The yellow ones are like skin cells, The red ones are like brain cells, The purple ones are like muscle cells… all different types of cells we have!
Cells
Cells
Skittles

11. Humans grow by getting more cells!
You get more purple, you get more red, you get more yellow… but cells do not get bigger

12. How many cells do we begin with?

13. 2

14. How do we get more?

15. One cell divides into two cells…
MITOSIS = the process of somatic cell division.
Notice that each cell is an EXACT COPY.
…then four, eight, sixteen…

16. Mitosis is ASEXUAL reproduction because all cells are identical.
Do you think mitosis…
is used for asexual reproduction or sexual reproduction???
Mitosis is ASEXUAL reproduction because all cells are identical.

17. DNA
Key Point #2: Cells must make an EXACT copy of their DNA before they divide
DNA = Deoxyribonucleic acid
Cells copy their DNA
Then, they divide in half
Every generation gets an identical copy of the DNA
Last bullet make them think.

18. Why do cells need to make a copy of their DNA before they divide?

19. DNA Key Point #3: Cell DNA is organized into coils called chromosomes.
Chromosomes are pieces of coiled DNA. They look like Xs.
CFU: What does DNA do again? (Instructions for how a cell should run)

20. 2 Legit 2 Quit
In humans, somatic cells have 23 different types of chromosomes
Somatic cells are 2N
2N = two of each type
One from mommy
One from daddy

21. Ok…
If we have two copies of each chromosome, how many copies do we have after we duplicate?
FOUR!
Using N…
4N! 4N

22. Notes Reflection (GP)
In your notes, you should be able to find answers FAST!
I am going to put up some questions. Within 30 seconds, should be able to find the answer.
If you do not have the answer in your notes, ADD IT IN!!!
Trying to reinforce good note taking. If you do not make good notes that you will suck at this game.

23. What is the process of somatic cell division called?
Guided Practice
What is the process of somatic cell division called?
Mitosis

24. How do organisms get bigger?
Guided Practice
How do organisms get bigger?
Lifting weights… duh

25. After mitosis, the two new cells are ___________ to each other.
Guided Practice
After mitosis, the two new cells are ___________ to each other.
identical

26. How is DNA organized in a cell?
Guided Practice
How is DNA organized in a cell?
instructions

27. Guided Practice
What type of reproduction is happening when you have two parents and all the children are different?
instructions

28. Guided Practice
What is a somatic cell?
instructions

29. Guided Practice
What does a cell do to make sure that DNA is the same from generation to generation?
coils of DNA

30. How many N does a somatic cell have normally?
Guided Practice
How many N does a somatic cell have normally? 2

31. How many N does a somatic cell after the cell duplicates its DNA?
Guided Practice
How many N does a somatic cell after the cell duplicates its DNA? 4

32. Independent Work Time Work on the worksheet…
What you do not finish is HOMEWORK!
If you finish early, HONORS WORK!
Photosynthesis
p. 203 #1-3, 5; p. 217 #2, 6, 7, 12-14, 16, 23; p. 219 #3
Cellular Respiration + ATP
p. 225 #1; p. 237 #1, 4, 9, 14, 21, 22; p. 234 #1, 4, 7, 8
Cell Growth and Division
p. 241 Begin to read chapter and answer the questions that follow

33. Key Point Wrap-Up
Key Point #1: Multicellular organisms get bigger because they make more somatic cells.
Key Point #2: Cells must make an EXACT copy of their DNA before they divide
Key Point #3: Cell DNA is organized into coils called chromosomes.

34. Why is it important that DNA doubles before mitosis?
Exit Question
What is a somatic cell?
Why is it important that DNA doubles before mitosis?
Write in complete sentences!
Don’t talk during the Exit Question!