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Asexual Reproduction

Asexual Reproduction. Ms. Zimmerman 7 th grade science. REVIEW!. What is reproduction? What’s the point? Stand up/Sit down Stand up if it’s ASEXUAL Sit down if it’s SEXUAL. Involves two parent organisms. SEXUAL. So how many parents are there in ASEXUAL?.

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Asexual Reproduction

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  1. Asexual Reproduction Ms. Zimmerman 7th grade science

  2. REVIEW! • What is reproduction? What’s the point? • Stand up/Sit down • Stand up if it’s ASEXUAL • Sit down if it’s SEXUAL

  3. Involves two parent organisms SEXUAL So how many parents are there in ASEXUAL?

  4. Your human mom or dad is a single parent SEXUAL

  5. The offspring are exact clones of its parent ASEXUAL

  6. The genes get weaker from generation to generation SEXUAL

  7. Strength in variety of offspring SEXUAL

  8. The species is not very good at resisting disease ASEXUAL

  9. Asexual vs. Sexual • when offspring are produced from a singleparent, it is called asexual reproduction • the offspring are identical to the parent! • By cell division, one cell divides to become two. • Used by simple organisms, such as protozoans, to reproduce. • In some multicellular organisms, this process is used to grow in size or to replace tissues. •  when offspring are produced from two parents, it is called sexual reproduction • the offspring is a combination of the two parents

  10. Kinds of Asexual reproduction • Binary Fission • Budding • Sporulation • Regeneration • Vegetative Propagation

  11. Asexual Reproduction • carried out by unicellular organisms, many lower animals, and many plants • offspring are identical to the parents • the process is usually rapid and results in a large number of offspring • there are several types of asexual reproduction

  12. Vocab • Genes • Clone • Offspring • Cell division

  13. Kinds of Asexual reproduction • Binary Fission • Budding • Sporulation • Regeneration • Vegetative Propagation

  14. Binary Fission • the equal division of nuclear material and cytoplasm resulting in 2 new organisms • Video: http://youtu.be/gEwzDydciWc Your cells are doing this RIGHT NOW!!!

  15. Budding - unicellular • similar to binary fission BUT has an unequal division of cytoplasm; offspring is smaller than the parent

  16. Budding - multicellular • a bunch of cells form a smaller organism on the original if conditions are favorable • the bud develops into a fully functional organism which may or may not detach from the parent • Video: http://youtu.be/489CSop00sY

  17. Sporulation • spores are single, specialized cells that are released from the parent and can develop into new individuals if the conditions are right • occurs in molds and mushrooms

  18. Regeneration • A) of body parts • new tissues can be produced to replace those lost or damaged • occurs in such animals as lobsters, crabs, and gecko lizards • B) new organisms • when an entire new organism is produced from part of the original organism • occurs in seastars and planarians (a type of simple annelid)(as long as a ray--one of the points--has some of the center piece, it can grow into a whole new seastar!)

  19. Vegetative Propagation • when new plants develop from roots, stems or leaves of the parent organism • many different types: cuttings, bulbs (onions), tubers (potatoes), grafting (apples)

  20. ***Asexual reproduction IS mitosis!!!***

  21. Brainpop! • http://www.brainpop.com/science/cellularlifeandgenetics/asexualreproduction

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