1. Cell Division for Reproduction
Students will differentiate between sexual and asexual reproduction, mitosis and meiosis and how humans actually reproduce through a series of videos, notes, rotation activities and a story book project.
ELL
IV-R-2-B-21
IV-R-2-B-22
IV-R-2-B-23
IV-R-2-B-28

2. Presentation Cues
No one wants to listen to the teacher the whole time;)
Volunteer/Class Discussion – quick answer from raised hand (remember/understand)
Pair/share – quick chat with neighbor and volunteer or teacher pick share (remember/understand/apply)
Group task – longer time for pair or group to apply, analyze, evaluate or create
Individual write – personal reflection on topic
Rotations – solve the station with group and write answer on paper, rotate with timer and stay with your group
5?Quiz – quick check for understanding about topic

3. Today we will learn about the two types of reproduction…
SCIENCE
NEED TODAY
Day 1
H5: Part 1
Asexual vs sexual
Rotations
Videos
Compare/contrast

4. Make each of these a single row…. Read p. 88-92 to gather information

5. Label the next space, leave about 4 lines to write examples from rotations…

6. Rotation Stations 7 1
At each station, you will write the title in your notes as an example of Asexual or Sexual Reproduction…
Slide title
Small description 6 2 3 5 4

7. MAMMALS
Lions reproduce when a male’s sperm joins a female’s egg

8. REGENERATION A starfish can REGENERATE a limb that has been cut off
They can also REGENERATE a new body from the removed piece

9. TREES
Male Ash trees produce pollen which lands on the female Ash Trees
Female Ash Trees use the pollen to create seeds that can then grow into new trees

10. BUDDING
A single parent hydra produces an identical offspring off the side of its body, which falls off and grows into mature hydra

11. BINARY FISSION
A single bacteria copies its information and divides in half to produce two bacteria through mitosis

12. SNAKE REPRODUCTION
Male and female snakes rub against each other so the male can transfer the sperm into the female through a spike
The female then lays eggs a few weeks later but doesn’t rear her young

13. HERMAPHRODITES
Any earthworm can join with any other earthworm to exchange genetic information. Both earthworms will then produce earthworm offspring

14. EXTERNAL FERTILIZATION
Female fish lays eggs in the bottom of a lake/river and the male follows behind, spraying its sperm over the top

15. Reproduction videos https://www.youtube.com/watch ?v=fcGDUcGjcyk
asexual
sexual
?v=fcGDUcGjcyk
?v=tFZeyFbBLXE

16. PROS/CONS….
We will look at a little more criteria to determine the pros/cons of each type of reproduction…
Make each of the following about 3 lines, write info from discussion in notes…

17. TIME:
less
more
ASEXUAL
SEXUAL

18. ENERGY:
less
more
ASEXUAL
SEXUAL

19. # PARENTS
ONE
TWO
ASEXUAL
SEXUAL

20. ORGANISM COMPLEXITY:
less
more
ASEXUAL
SEXUAL

21. GENETIC VARIATION:
NONE
INCREASED
ASEXUAL
SEXUAL

22. GENETIC VARIATION:
NONE
INCREASED
ASEXUAL
SEXUAL

23. Why is Genetic Variation Important?
If a population is 100% genetically the same, everything will affect them the same
Poisons
Diseases
Allergies
If one dies, we all die
Species survival is greater with variation!

24. Class discussion: How are they similar and different?

25. Today we will learn about the 2 forms of cell division…
SCIENCE
NEED TODAY
Day 2
Mitosis vs Meiosis
Video Notes
Compare
Game

27. Notes from Video
DvYxglg1RFz6p5c8wMbAm0K3qYzy

28. How many divisions?
MITOSIS
one
MEIOSIS
two

29. How many new cells produced?
MITOSIS
two
MEIOSIS
four

30. How much DNA in each cell?
MITOSIS
Full set
46 csomes
MEIOSIS
Half set
23 csomes

31. Name of cells?
MITOSIS
Body cells
MEIOSIS
Gametes (sperm & eggs)

32. Location?
MITOSIS
All body cells
MEIOSIS
Ovaries – women
Testes - men

33. Purpose?
MITOSIS
Growth and repair
MEIOSIS
Makes Eggs and Sperm

34. Human DNA = every cell full set (23pair)

35. Multicellular Organisms
MITOSIS
MEIOSIS
Growth
Repair
Sexual Reproduction
Makes Sperm & Eggs

36. Cells are like Bricks… Few Bricks Millions of Bricks Little building
Big building

37. Unicellular Organisms
MITOSIS
MEIOSIS
Asexual Reproduction
Doesn’t happen

38. Game
Table will decide, Mitosis or Meiosis and write on board

39. A lizard regenerates a new tail…..
MITOSIS
(repair)

40. A hen ovary produces an egg…
MEIOSIS
(sexual reproduction)

41. A bacteria makes more to cause an infection….
MITOSIS
(asexual reproduction)

42. A male’s testes make sperm…
MEIOSIS
(sexual reproduction)

43. A puppy grows into a dog….
MITOSIS
(growth)

44. A broken bone heals…
MITOSIS
(repair)

45. Class discussion: How are they similar and different?

46. Today we will learn how gametes make a human…
SCIENCE
Day 3
SPECIALIZATION
When things don’t go as planned…
Infertility
In Vitro
Surrogacy
Miscarriage
Birth complications
Twins
Hybrids
NEED TODAY

47. Notes from Video
DvYxglg1RFz6p5c8wMbAm0K3qYzy

48. FERTILIZATION Sperm (23) + Egg (23) ZYGOTE (46)
This is where we get the term Hetero”zygous”

49. ZYGOTE
First cell with a full set of chromosomes (1/2 from each parent)
This is where we get the term Hetero”zygous”

50. Once Zygote is formed, organism grows through MITOSIS!

51. MORE MITOSIS!

52. SPECIALIZATION: Stem (embryonic) cells become different types of cells – no turning back

53. Specialized Cells develop into baby…

54. How are twins?

55. Chimera 2 embryos fuse into one being

56. Conjoined Twins Incomplete split to form identical twins

57. Story Book Project

58. Why Project?

59. Application to Real Life…
More
Respons ibi l
i ty
More
Think ing
Application to Real Life…
More
Money
We want our students to reach their personal best, so emphasizing this point is important for their futures

60. Multicellular Organisms
MITOSIS
MEIOSIS
Growth
Repair
Sexual Reproduction
Makes Sperm & Eggs

61. Unicellular Organisms
MITOSIS
MEIOSIS
Asexual Reproduction
Doesn’t happen