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Topic: Reproduction Aim: How is the human body adapted for reproduction?

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Presentation on theme: "Topic: Reproduction Aim: How is the human body adapted for reproduction?"— Presentation transcript:

1 Topic: Reproduction Aim: How is the human body adapted for reproduction?

2 What is an adaptation? the structure of an organism, which allows the organism be better fitted to survive and reproduce in its environment.

3 What is Reproduction? The process that continues life on earth by producing off spring Reproduce= make copies

4 What are offspring? a child or animal who have related features to its parent or parents Features include in humans: Shape of nose Shape of eyes Shape of your head

5 Two forms of Reproduction Asexual Reproduction Sexual Reproduction

6 Final Summary

7 Topic: Cellular Reproduction Aim: How does Mitosis occur? Do Now: Think of the worst cut you ever got Write how you got it and why you no longer see the cut but a scar. One time when I ________________ ________________ ________________ __

8 1. the cell is the basic unit of structure and function all living things. 2. all cells come from pre-existing cells by division. 3. All living things contain cells Lets review The Cell Theory

9 Which Cell theory principle refers to cell reproduction? 1.) All cells come from pre-existing cells by division 2.) Cells contain DNA that are passed down from “parent cell” to “daughter cell”

10 How do body cells make exact copies of themselves? Mitosis It is the process of duplicating (doubling, replicating) the amount of DNA inside the cell’s nucleus. Then Splitting/ dividing that doubled amount of DNA into two separate cells evenly 46 92 46 There are 5 stages

11 Results of Mitosis two new nuclei that are identical to each other and the original nucleus. Each new nucleus has the same number and type of chromosomes. Reasons of Mitosis Growth and development Repair of lost and damaged tissues

12 Each of the trillions of cells in your body, except sex cells, has a copy of the same hereditary material. Every cell in your body, except sex cells, has a nucleus with 46 chromosomes—23 pairs.

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14 Final Summary

15 Topic: Reproduction Aim: How does Asexual Reproduction vary? Do Now: Describe: What happens to bread left out on the counter over two weeks and Why do you think this happens. What happens to bread that has been left out is _______________________ _______________________

16 What is Asexual Reproduction? The process of forming an identical offspring (“clone”) from a single parent organism or single-cell

17 How many ways can Asexual Reproduction Occur? 2.) Budding 1.) Binary Fission 3.) Sporulation 4.) Regeneration 5.) Vegetative Propagation

18 Binary Fission equal division of the nucleus and cytoplasm two new organisms from a single parent Occurs mainly in unicellular organisms Amoeba Paramecium Bacteria

19 Budding unequal division of nucleus and cytoplasm daughter offspring (BUD) from parent organism The bud can be attached or detached from parent organism Hydra- multi-cellular organism Yeast- Unicellular organism

20 Sporulation Is the process where spores are released as small reproductive cells from a parent organism If Spores land in a moist and favorable temperature they will develop into new organisms Examples: Mushrooms, Mold & Fern (plant)

21 Regeneration development of an entire new organism from a part of the original organism Also refers to the replacing of lost structures Examples: Starfish Round worms Crabs Lobsters

22 Vegetative Propagation Is the process that allows plant to reproduce without using seeds or spores

23 Types of Vegetative Propagation 1.) Runners Example: Strawberries 2.) Bulbs Example: Onions, tulips 3.) Tubers Example: Potatoes

24 Final Summary

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26 Topic: Reproduction Aim: Are you able to identify the various types of asexual reproduction? Do Now: MOTIVATION:

27 1.) Runners Example: Strawberries 2.) Bulbs Example: Onions, tulips 3.) Tubers Example: Potatoes

28 Topic: Cellular Reproduction Aim: How does meiosis occur?

29 Meiosis is the type of cell division by which sex cells (eggs and sperm) are produced. Meiosis involves a reduction in the amount of genetic material. A.K.A. reduction division To maintain normal chromosome number once fertilization occurs 23 46

30 A.K.A. Gametes Examples: human egg and sperm cells Function is to fertilize Used to carry out sexual reproduction Have ___ chromosomes each 23

31 Meiosis consists of two successive nuclear divisions with only one round of DNA replication. 92 46 23 46 Parent cell 4 Daughter cells

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