1. 11/01/11
FOOD FOR THOUGHT:
Which two characteristics of living things have to do with living things having babies and those babies getting bigger over time?

2. a. The skin cells stretched b. You got more skin cells
11/01/11
FOOD FOR THOUGHT:
Think about how much skin you had when you were a baby compared to how much skin you have no. How do you think you got more skin?
a. The skin cells stretched
b. You got more skin cells

3. 11/01/11
EVERY SINGLE CELL IN YOUR BODY HAS DNA. Do you think your egg (girl)/sperm (boy) cells have the same amount of DNA as your skin cells?
a. Yes
b. No
Why?

4. multicellular organisms have 2 types of cells:
11/01/11
multicellular organisms have 2 types of cells:
GAMETES aka sex cells
SOMATIC CELLS aka body cells

5. 11/01/11
DNA
Key Point #1: ALL cells have genetic material called DNA organized into units called chromosomes
DNA (deoxyribose nucleic acid) is the instructions for how a cell should run. It is what makes you “you.”
Chromosomes are made of DNA.
They look like Xs.

6. How many chromosomes do human somatic cells have?
11/01/11
How many chromosomes do human somatic cells have?
In humans, somatic cells have 23 PAIRS of chromosomes (23 x 2 = 46 total)
One from mommy and one from daddy
S Somatic cells are 2N.
N = how many of each TYPE of chromosome
1N means 1 set of each (23)
2N means 2 sets of each (46)
3N means 3 sets of each (72)
4N means 4 sets of each (96)

7. How many chromosomes do human sex cells have?
11/01/11
How many chromosomes do human sex cells have?
When it is time to make sex cells, or gametes (egg and sperm), you DON’T want the cells to have 23 pairs of chromosomes!
In humans, sex cells have 23 total chromosomes
Sex cells are 1N (just one set of chromosomes) 46 23 46 92 46 23 7

8. How many N? How many total chromosomes?
11/01/11
EGG CELL
BRAIN CELL

9. How many N? How many total chromosomes?
11/01/11
EGG CELL
23 chromosomes
N (haploid)
HAPLOID MEANS 1N!
BRAIN CELL

10. How many N? How many total chromosomes?
11/01/11
EGG CELL
23 chromosomes
N (haploid)
HAPLOID MEANS 1N!
H FOR HALF
BRAIN CELL
46 chromosomes
2N (diploid)
DIPLOID MEANS 2N!
D FOR DOUBLE

11. Metabolism, reproduction, growth, organization, response, evolution
11/01/11
Metabolism, reproduction, growth, organization, response, evolution
Key Point #2:
Multicellular organisms get bigger because they get more somatic cells.
Key Point #3:
Multicellular organisms can have babies by creating gametes.

12. Making more cells… When we make gametes it is called MEIOSIS
11/01/11
Making more cells…
When we make gametes it is called MEIOSIS
When we make more somatic cells
it is called MITOSIS

13. WHAT IS THE POINT OF GOING THROUGH THESE CELL DIVISIONS?
11/01/11
WHAT IS THE POINT OF GOING THROUGH THESE CELL DIVISIONS?
MEIOSIS is for…
MITOSIS is for…

14. WHAT IS THE POINT OF GOING THROUGH THESE CELL DIVISIONS?
11/01/11
WHAT IS THE POINT OF GOING THROUGH THESE CELL DIVISIONS?
MEIOSIS is for…
MITOSIS is for…
reproduction
growth

15. So… is the cell constantly dividing?
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So… is the cell constantly dividing?

16. 11/01/11
The Cell Cycle
Splitting could mean mitosis or meiosis depending on the cell!

17. Interphase Key Point #4:
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Interphase
Key Point #4:
The time between cell divisions is called INTERPHASE
Think INTER-MISSION! It’s just the time in between the exciting parts. M
Interphase

18. What happens during interphase?
11/01/11
What happens during interphase?
This is when the cell does its normal cell things.
Ear cells let you hear.
Lung cells allow you to breathe.
Muscle cells let you move.
When a cell is getting ready to split, its DNA is doubled so that the resulting cells have the right amount of DNA!

19. Why must cells must make an EXACT copy of their DNA before they divide?
11/01/11
If they don’t…
If they do… 46 92 46
THIS PICTURE
IS FOR SOMATIC
CELLS, SO YOU WANT
THE NEW CELLS TO
HAVE 46 X’s 46
Last bullet make them think. 23 23 19

20. BALLER REACH QUESTION… how many ‘N’ are each of these phases?
11/01/11
BALLER REACH QUESTION… how many ‘N’ are each of these phases?
If they do… 46 92
Last bullet make them think. 20

21. BALLER REACH QUESTION… how many ‘N’ are each of these phases?
11/01/11
BALLER REACH QUESTION… how many ‘N’ are each of these phases?
If they do… 46 92 2N
Last bullet make them think. 21

22. BALLER REACH QUESTION… how many ‘N’ are each of these phases?
11/01/11
BALLER REACH QUESTION… how many ‘N’ are each of these phases?
If they do… 46 92 2N
Last bullet make them think. 2N 22

23. BALLER REACH QUESTION… how many ‘N’ are each of these phases?
11/01/11
BALLER REACH QUESTION… how many ‘N’ are each of these phases?
If they do… 46 92 2N 4N
Last bullet make them think. 2N 23

24. CELL DIVISION HAS SOOOOO MUCH VOCAB, LET’S GET IT STRAIGHT
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CELL DIVISION HAS SOOOOO MUCH VOCAB, LET’S GET IT STRAIGHT
… STARTING WITH HOW MANY N SOMETHING HAS….

25. 11/01/11
How many N?

26. 11/01/11
How many N?

27. 11/01/11
Diploid means _N

28. 11/01/11
Haploid means _N

29. 11/01/11
Somatic Cells are _N

30. 11/01/11
Sex Cells are _N

31. Your choices are mitosis or meiosis
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Your choices are mitosis or meiosis

32. Your choices are mitosis or meiosis
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Your choices are mitosis or meiosis
This type of cell division is used for growth…

33. Your choices are mitosis or meiosis
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Your choices are mitosis or meiosis
This type of cell division results in 2N cells

34. Your choices are mitosis or meiosis
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Your choices are mitosis or meiosis
This type of cell division exists so that you can reproduce

35. Your choices are mitosis or meiosis
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Your choices are mitosis or meiosis
This type of cell division creates more somatic cells

36. 11/01/11
These are open ended…

37. 11/01/11
These are open ended…
CHROMOSOMES ARE MADE OUT OF _________

38. 11/01/11
rEEEEEEEEach.
If an alligator skin cell starts with 52 total chromosomes, how many chromosomes will the new skin cells have?

39. 11/01/11
rEEEEEEEEach.
If a monkey somatic cell has 20 pairs of chromosomes, how many chromosomes will the monkey’s sperm cells have?

40. 11/01/11
SWAT.
&d=DPPZ