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

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Presentation on theme: "Asexual Reproduction in Protists & Monerans AND Comparing Sexual & Asexual Reproduction."— Presentation transcript:

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2 Asexual Reproduction in Protists & Monerans AND Comparing Sexual & Asexual Reproduction

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

4 Define (glossary p. 731) fertilization

5 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

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

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

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

10 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

11 Fertilization Animation

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

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

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

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

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

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19 Review: Sexual Reproduction in Animals Describe the process of fertilization

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

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

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

23 Asexual reproduction Cloning com/science/cellular lifeandgenetics/cloni ng/ Binary fission e.com/books/hs/ca/s c/bio_07/animated_ biology/bio_ch05_01 49_ab_fission.html

24 Asexual reproduction Budding com/watch?v=489C Sop00sY Regeneration com/watch?v=f7cXe WxxfD4&feature=rel ated

25 Asexual reproduction com/science/cellular lifeandgenetics/asex ualreproduction/

26 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

27 Binary Fission Images

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29 Binary Fission Clips

30 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

31 Hydra Budding Images

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

33 Regeneration Pictures

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

35 Cloning pictures

36 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?

37 What are the advantages of each: Asexual- Sexual-

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

39 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

40 Websites Animal Reproduction Animations Animal Life Cycles


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