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Asexual Reproduction in Protists & Monerans AND Comparing Sexual & Asexual Reproduction. GOAL. To compare sexual and asexual reproduction in animals, protists and monerans. Define (glossary p. 731). fertilization. Facts: previous knowledge. 1.Male sex cell is called the __________ - PowerPoint PPT Presentation
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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
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
Sexual Reproduction Process:
Sperm fertilizes egg to form zygote (single cell)
Zygote divides repeatedly until it forms an embryo
Sexual Reproduction Process:
Embryo develops into a fetus (begins to look like parents)
Offspring is born
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
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
Animals: Sexual Reproduction
Sexual Reproduction in Animals
6. Number of chromosomes
• In human body cells = 46 chromosomes
• In human sex cells = 23 chromosomes
Animals: Sexual Reproduction
Sexual Reproduction in Animals
7. Egg (23) + sperm (23) = 46 chromosomes
Animals: Sexual Reproduction
Sexual Reproduction in Animals
8. Once fertilization is completed, zygote divides by mitosis (asexual reproduction)
Review: Sexual Reproduction in Animals
Describe the development of an organism immediately after fertilization
Review: Sexual Reproduction in Animals
Compare the number of chromosomes in sex cells with the number of chromosomes in body cells
Asexual Reproduction Methods
Asexual Reproduction
Algae, amoeba
bacteria
growing animals, plants and fungi
Asexual reproduction
Cloning
http://www.brainpop.com/science/cellularlifeandgenetics/cloning/
Binary fission
http://www.classzone.com/books/hs/ca/sc/bio_07/animated_biology/bio_ch05_0149_ab_fission.html
Asexual reproduction
Budding
http://www.youtube.com/watch?v=489CSop00sY
Regeneration
http://www.youtube.com/watch?v=f7cXeWxxfD4&feature=related
Asexual reproduction
Asexual reproduction
http://www.brainpop.com/science/cellularlifeandgenetics/asexualreproduction/
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
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
Asexual Reproduction Methods
Regeneration 1. Living things repair themselves by growing lost body parts from remaining cells
2. Ex: lobsters, starfish, lizards
Asexual Reproduction Methods
Cloning 1. Making exact copies of organisms – gets DNA from only one parent cell
2. Ex. Dolly the sheep
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?
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– 23 + 23 --> 46– Two parents– Cells produced are different
from their parents- due to gene mixing
– Yes– Bacteria, amoeba, algae,
growing plants, animals, and fungi