1. Asexual Reproduction in Protists & Monerans AND Comparing Sexual & Asexual Reproduction

2. GOAL
To compare sexual and asexual reproduction in animals, protists and monerans

3. Define (glossary p. 731)
fertilization

4. Facts: previous knowledge
1.Male sex cell is called the __________
2. Female sex cell is called the __________
3. All body cells have ________ chromosomes; sex cells have _____ each so when they join together there will be a full set of 46

5. Animals: Sexual Reproduction
1. Animals, some plants, fungi, protists
2. 2 parents= male & female
3. Sex cells (Gametes)
Male= sperm
Female= egg
Sexual Reproduction in Animals

7. Sexual Reproduction Process:
Sperm fertilizes egg to form zygote (single cell)
Zygote divides repeatedly until it forms an embryo

8. Sexual Reproduction Process:
Embryo develops into a fetus (begins to look like parents)
Offspring is born

9. Sexual Reproduction Diagram
Create a flow chart with pictures to explain the process of sexual reproduction. Label the sperm, egg, zygote, cell division, embryo & fertilization point

10. Fertilization Animation

11. Fertilization Animation

12. Numbers of offspring
Humans- 1
Elephant/horse- 1
Cat- 4/5
Dog- 1/12

13. Animals: Sexual Reproduction
5. Appearance of offspring
a. Two parents
b. Two sets of chromosomes
c. Two sets of genes
d. Genes mix- traits from both parents
Sexual Reproduction in Animals

14. Animals: Sexual Reproduction
6. Number of chromosomes
In human body cells = 46 chromosomes
In human sex cells = 23 chromosomes
Sexual Reproduction in Animals

15. Animals: Sexual Reproduction
7. Egg (23) + sperm (23) = 46 chromosomes
Sexual Reproduction in Animals

16. Animals: Sexual Reproduction
8. Once fertilization is completed, zygote divides by mitosis (asexual reproduction)
Sexual Reproduction in Animals

18. Review: Sexual Reproduction in Animals
Describe the process of fertilization

19. Review: Sexual Reproduction in Animals
Describe the development of an organism immediately after fertilization

20. Review: Sexual Reproduction in Animals
Compare the number of chromosomes in sex cells with the number of chromosomes in body cells

21. Asexual Reproduction Methods
Algae, amoeba
bacteria
growing animals, plants and fungi

22. Asexual reproduction Cloning
Binary fission

23. Asexual reproduction Budding
Regeneration

24. Asexual reproduction Asexual reproduction

25. Asexual Reproduction Methods
Binary Fission
1. Bacteria
2. Organism divides in half
3. 2 identical daughter cells produced (half the size of their parent)
4. Daughter grows to parental size- then divides

26. Binary Fission Images

27. Binary Fission Images

28. Binary Fission Clips

29. Asexual Reproduction Methods
Budding
1. Small bud grows out of parent cell (with identical DNA)
2. Bud breaks off when large enough
Ex. Hydra, potato

30. Hydra Budding Images

31. Asexual Reproduction Methods
Regeneration
1. Living things repair themselves by growing lost body parts from remaining cells
2. Ex: lobsters, starfish, lizards

32. Regeneration Pictures

33. Asexual Reproduction Methods
Cloning
1. Making exact copies of organisms – gets DNA from only one parent cell
2. Ex. Dolly the sheep

34. Cloning pictures

35. Comparing Asexual & Sexual Reproduction
Create a T-chart to compare the following:
How many parents?
Are sex cells needed?
What numbers of chromosomes are involved? (at the beginning and at the end)
Are offspring different from or identical to parents and why?
What types of organisms?

36. What are the advantages of each:
Asexual-
Sexual-

37. ANSWERS: ADV. Sexual- variation in traits evolution
asexual- no mate needed
DISADV.

38. Comparing Reproduction Types
ASEXUAL
46 --> 46
One parent
Cells produced are identical to the parent- no gene mixing No
Some plants, animals, and fungi
SEXUAL
> 46
Two parents
Cells produced are different from their parents- due to gene mixing
Yes
Bacteria, amoeba, algae, growing plants, animals, and fungi

39. Websites
Animal Reproduction Animations
Animal Life Cycles