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ASEXUAL AND SEXUAL REPRODUCTION_3.pptx
- 1. ASEXUAL AND SEXUAL REPRODUCTION BY: MRS. REJOICE C. TILLO SCIENCE TEACHER
- 2. OBJECTIVE: At the end of the session the students should be able to differentiate sexual from asexual reproduction in terms of: 1. number of individuals involved; 2. similarities of offspring to parents
- 4. • “make a new life” • sustain the species so that it does not become an extinct
- 9. Asexual Reproduction Methods of Reproduction: Binary Fission Fragmentation Budding
- 10. Asexual Reproduction Binary Fission occurs when a parent cell splits into two identical daughter cells of the same size ex. bacteria
- 11. Asexual Reproduction Fragmentation occurs when a parent organism breaks into fragments or pieces and each fragment develops into a new organism ex. starfish
- 12. Asexual Reproduction Budding occurs when a parent cell forms a bubble like butt the bud stays attached to the parent cell while it grows and develops when the bud is fully developed it breaks away from the parent cell and forms a new organism Ex. Hydra
- 13. Asexual Reproduction Spore Formation Spore formation is another means of asexual reproduction. During unfavorable conditions, the organism develops sac-like structures called sporangium that contain spores. When the conditions are favorable, the sporangium burst opens and spores are released that germinate to give rise to new organisms. Ex. Rhizopus
- 14. Asexual Reproduction Vegetative Propagation Vegetative reproduction is any form of asexual reproduction occurring in plants in which a new plant grows from a fragment or cutting of the parent plant or specialized reproductive structures, which are sometimes called vegetative propagules Ex. Food crops such as cassava, sweet potato, sugarcane, pineapple, banana, onion, etc
- 15. Activity No. 1 Venn Diagram of Sexual and Asexual Reproduction Direction: Compare and contrast sexual from asexual reproduction using a Venn diagram. Choose your answer from the word bank WORD BANK Two parents Produces offspring No formation of gametes Genetic variation Lower organisms Increases population Formation of gametes Genetically identical One parent Minimum of two offspring Higher organisms Minimum of one offspring
- 16. Generalization Organisms reproduce either sexually or asexually. The main difference between sexual and asexual reproduction is the number of parents involved. Sexual Reproduction means combining genetic material from two parents while a sexual reproduction produces offspring genetically identical to one parent only.