1. DO NOW!!! True or False Reproduction requires two parents.
Some organism reproduce by cell division.
New plants can grow from parts of a parent plane, such as roots and stems.
Offspring of two parents always look like one of their parents.
F, T, T, F

2. Unit 2 Lesson 3

3. Reproduction Reproduction involves various kinds of cell division.
2 different kinds of reproduction:

5. Asexual Reproduction
1 organism produces – 1 or 2 genetically identical new organisms
Most single-celled organisms and some multicellular organisms

7. Asexual Reproduction Parent – organism that produces new organism
Offspring – new organisms created
Genetically identical to their parents.

8. Asexual Reproduction
Includes – Prokaryotes such as bacteria & some eukaryotes reproduce using more complex cell division - mitosis.

9. Types of Asexual Reproduction (Pg. 115)
Binary fission - prokaryotes.
Budding - bud grows on an organism and develops into a full-sized organism – result of mitosis

10. Budding
Hydra

11. Types of Asexual Reproduction
Spores - specialized cell - can survive harsh conditions – are light and can be carried by the wind.

12. Runners / Stolons – above ground asexual reproduction
Vegetative Reproduction (Plants)
Runners / Stolons – above ground asexual reproduction

13. Rhizomes – below ground asexual reproduction

15. Vegetative Reproduction
Potato - underground stem
Eyes of potato – area where fresh buds sprout
Potato - cut up into small pieces & provided with water and air.
Potato eyes develop buds and grow into new plants.

16. HW
Read pages 114 – 115 and complete questions # 5 & 7

17. DO NOW!!! Read page 116 and complete question #8 and 9

19. Sexual Reproduction
2 parents - contribute a sex cell to the new organism.
New organism – half the genes from one parent and half from the other
Multicellular organisms

20. Sex Cells Male gametes - sperm cells. Females gametes - eggs.
Produced by meiosis.

21. Sexual Reproduction
Sex cells – genetic material – 23 chromosomes (half the # if body cells)
Sperm + egg - join together - fertilization. 21

22. Sexual Reproduction
Egg fertilized by a sperm – zygote is formed with 46 chromosomes
Zygote - new organism - grows through mitosis.

23. Odd Reproduction Regeneration
Some Multicellular - reproduce asexually.
Parthenogenesis - female produces young without fertilization.
Fragmentation - segments fall off and become new organisms.
Regeneration

24. Asexual Reproduction

25. Sexual Reproduction

26. Using Both Types of Reproduction
Allows – rapid growth, spread quickly, and adapt to changes in environment

27. Planaria

28. Similarities and Differences

29. HW
Complete Questions 13 – 16 on Page

30. Teaching Kitchen Lab