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Download 5.4 Asexual Reproduction Binary fission is similar in function to
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5.4 Asexual Reproduction KEY CONCEPT Many organisms reproduce by cell division. 5.4 Asexual Reproduction Objectives • Compare and contrast binary fission and mitosis. • Describe how some eukaryotes reproduce through mitosis. 5.4 Asexual Reproduction Vocabulary • Asexual Reproduction – Process by which offspring are produced from a single parent; does not involve the joining of gametes. • Binary Fission – Asexual reproduction in which a cell divides into two equal parts. 5.4 Asexual Reproduction Binary fission is similar in function to mitosis. • Asexual reproduction is the creation of offspring from a single parent. – Binary fission produces two daughter cells genetically identical to the parent cell. parent cell – Binary fission occurs in prokaryotes. DNA duplicates cell begins to divide daughter cells 5.4 Asexual Reproduction • Environment determines what form of reproduction is most advantageous. – Asexual reproduction is an advantage in consistently favorable conditions. – Sexual reproduction is an advantage in changing conditions. 5.4 Asexual Reproduction Some eukaryotes reproduce through mitosis. • Budding forms a new organism from a small projection growing on the surface of the parent. Hydra bud Yeast 5.4 Asexual Reproduction • Fragmentation is the splitting of the parent into pieces that each grow into a new organism. • Vegetative reproduction forms a new plant from the modification of a stem or underground structure on the parent plant. 5.4 Asexual Reproduction Question/Answer • How is asexual reproduction an advantage in some conditions? – Asexual reproduction produces genetically identical offspring that are well suited to their environment. • How might the asexual reproduction of genetically identical plants be useful to humans? How could it prove harmful to our food supply? – Since asexually reproduced plants are clones, we can theoretically grow a particular plant in abundance under certain conditions. However, if conditions change, a significant portion of our food supply could be adversely affected.
