Asexual Reproduction


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Asexual Reproduction

  1. 1. Reproduction The process by which an organism produces others of its same kind. One form of reproduction is …
  2. 2. Asexual Reproduction A new organism (sometimes more than one) is produced from one organism. The offspring will have hereditary material uniform with the hereditary material of the parent organism. This means they will be genetically alike.
  3. 3. Types of Asexual Reproduction Parthenogenesis Vegetative Propagation Fragmentation or Regeneration Fission Budding
  4. 4. Parthenogenesis Produce eggs that develop into genetically identical versions of itself. The population is entirely female. The females lay unfertilized eggs that develop into genetically identical females. The Whiptail lizard lives in the Sonoran Desert in Arizona. This lizard will lay an egg which will grow into another lizard.
  5. 5. Vegetative Propagation Common in household plants; a piece is cut with visual nodes, placed in water to develop roots, then planted in soil. Another type is seen in the strawberry plants; they produce runners creating more plants.
  6. 6. Fragmentation Regeneration The ability to restore lost or damaged tissues, organs or limbs. It is a common feature in invertebrates, like flatworms and sea stars.
  7. 7. Fission • Also called binary fission. • Becoming two by division of the complete organism. • A type of cell division. A single celled organism; paramecium undergoing binary fission. Diphtheria bacteria live in the throat and produce toxins. You are vaccinated for this bacteria
  8. 8. Budding • Process by which a new, duplicate plant or animal begins to form at the side of the parent and enlarges until an individual is created. • Very common in plants. Hydra in fresh water Texas Prickly Pear Cactus
  9. 9. Pros • Faster and easier; one parent so no need for fertilization. • Doesn’t have to travel, can conserve energy, and be more discreet. • More reliable, less steps to go wrong. • No variations in the population; offspring look like the parent. • Individual may not adapt to changing environment. • Generally leads to overcrowding and a struggle to exist. Cons
  10. 10. TAKS Review Which statement about the asexual reproduction of the cell in the diagram below is correct? Cell Division A. Cell A contains the same DNA as cells B and C. B. Cell C has DNA that is only half identical to cell B. C. Cells B and C have identical DNA but not the same as cell A. D. Cells A, B, C contain completely different DNA. Animal Cell “A” Animal Cell “C” Animal Cell “B”
  11. 11. Resources: • • • • • • • • • Ohio Department of Education – Asexual Reproduction (document in 09-010 folder • 5_01.pdf • •