Understanding Asexual Reproduction in Organisms
Asexual reproduction requires only one parent, resulting in offspring that are exact clones of the parent, with the same DNA and chromosomes. This method is common in one-celled organisms and involves processes like binary fission, plant cuttings, budding, fragmentation, and regeneration. Various organisms such as Hydra, Paramecium, Yeast, and Sea Stars reproduce asexually. This method of reproduction ensures genetic uniformity and is vital for the survival of many species.
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Asexual Reproduction Requires only one parent Offspring have 100% the same chromosomes as the parent. Same exact DNA as parents! In other words, the offspring are exact clones of the parent. Most one celled organisms reproduce this way. Mitosis Movie 3
Asexual Reproduction processes Binary Fission Paramecium Bacteria Protists Binary fission is a form of asexual reproduction where every organelle is copied and the organism divides in two. 4
Asexual Reproduction processes Plant cuttings Vegetative reproduction is a type of asexual reproduction in plants that relies on multi- cellular structures formed by the parent plant. It has long been exploited in horticulture and agriculture, with various methods employed to multiply stocks of plants. 5
Asexual Reproduction Budding Hydra Movie Budding is a means of asexual reproduction whereby a new individual develops from an outgrowth of a parent, splits off, and lives independently. 6
Asexual Reproduction processes http://tbn0.google.com/images?q=tbn:u17MaSt6Xu8DoM:http://www.americanaquariumproducts.com/images/graphics/planaria.jpg Fragmentation Fragmentation is a means of asexual reproduction whereby a single parent breaks into parts that regenerate into whole new individuals. 7
Asexual Reproduction processes Regeneration Regeneration occurs when a body part has broken off and the organism grows a new one. 8
Asexual Reproduction Examples Examples of organisms that reproduce asexually Hydra http://tbn1.google.com/images?q=tbn:ZnZ5qL1KkKozPM:http://www.isledegrande.com/giimages9/wildstrawberryrunners.jpg http://tbn2.google.com/images?q=tbn:dHvm71rhWYuQ_M:http://overcomingcandida.com/mycology/yeast-dk1.jpg Sea Star Strawberry Archaebacteria Eubacteria http://tbn3.google.com/images?q=tbn:1xCb2RKMv__guM:http://genome.jgi-psf.org/draft_microbes/images/metba.gif Euglena Paramecium Yeast 9
Sexual Reproduction Requires two parents that each contribute of the genetic information. ( from sperm ; from egg ) Offspring share the characteristics of each parent. Offspring is a mix of parents DNA! This results in genetic diversity (differences) 10
Sexual Reproduction All the members of the Animal Kingdom Fish Mammals Amphibians Birds Reptiles Insects Crustaceans 11
Sexual Reproduction Plant Kingdom Flowers are the reproductive organs of plants. Male flower Female flower Some flowers have both male and female reproductive organs on the same flower. 12
Sexual Reproduction Examples of organisms that reproduce sexually Chickens http://tbn0.google.com/images?q=tbn:LCOoAh3i3iVG5M:http://www.nps.gov/wica/naturescience/images/Annual-Sunflower.jpg http://tbn0.google.com/images?q=tbn:w_YsoPTGJtE8QM:http://www.vivanatura.org/Iguana_iguana_juv1.jpg http://tbn2.google.com/images?q=tbn:36DC8OVa8VIIWM:http://www.thetechherald.com/media/images/200831/HumanElement_3.jpg Iguanas Lobsters Sharks http://tbn0.google.com/images?q=tbn:c0_omok8vdKuOM:http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/butterflies/icons/butterfly.jpg Humans http://tbn1.google.com/images?q=tbn:xsmRMkhyditooM:http://www.sealifegifts.net/user_images/lobster4a.JPG http://tbn0.google.com/images?q=tbn:xGrsS2ewOy51vM:http://michaelscomments.files.wordpress.com/2007/10/shark.jpg Butterflies Sunflowers Roses 13
Sexual Reproduction Happens 2 ways Internally (inside) The egg is fertilized by sperm inside the female Mammals, birds, reptiles, insects, spiders Externally (outside) The egg is fertilized by sperm outside the female The female lays the eggs and then the male fertilizes them. Fish and some amphibians Plants and fungi (pollen and spores) 14
