Asexual reproduction


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Asexual reproduction

  1. 1. AsexualReproduction
  2. 2. Reproduction• Reproduction is the capacity of all living things to give rise to new living things.• includes the transmission of hereditary material from the parent/parents.• two types – asexual beginning – sexual.
  3. 3. Asexual Reproduction Basics Is the simplest form of reproduction Occurs in plants, simple animals, bacteria, and protists Requires one parent Is more reliable than sexual reproduction Doesn’t allow for any type of genetic variation
  4. 4. The 6 typesSporulationFragmentationRegenerationBinary FissionBuddingVegetative propagation
  5. 5. SporulationUses spores spore is a reproductive cell that produces a new organismSpores are unicellularIf conditions are right a spore will develop into a new individualThey can be carried by the wind, water, or animals
  6. 6. FragmentationWhen a organism is broken into morethan one partOrganism must have good regenerationabilitiesCreate many new organisms quickly
  7. 7. RegenerationAn organism can replace/re-grow aninjured or lost partRegeneration in plants from Roots Stem leafRegeneration in animals For simple organisms No vertebrates have this power Examples are starfish and the salamander
  8. 8. Binary FissionOne parent dividing into two bymitosisOffspring are always geneticallyidenticalCells may stay close together toform filaments or coloniesExamples-Bacteria and Amoebas
  9. 9. BuddingForm on part of the parent bygrowing an outgrowth which thendetachesExample- is Hydra and YeastOffspring will always be geneticallyidentical to the parent
  10. 10. Vegetative Propagation Plant parts make new plant Reproduction is very quick Disadvantage: many plants grow close to each other1. Bulbs – Underground stem – Surrounded by colorless leaves – Colorless leaves protect the bulb – The green leaves store the food
  11. 11. 2. Rhizomes – Underground stem – They store food for new plant – At the end of Rhizomes nodes form3. Runners/Stolon (strawberries) – They are above ground. – Stems – Nodes form at the end of Runners – They grow outward
  12. 12. 4. Tuber (potatoes) – Underground stem – Stores food – The nodes eat the tuber – Potatoes have eyes / buds to make new tubers and or reproduce5. Grafting – Surgically connecting two similar plants – Ex. Apples – Not done naturally
  13. 13. 6. Cutting – Cutting off a stem or leaf to reproduce a new plant – Must be in wet or moist area – Combination of regeneration and fragmentation – Not done naturally7. Stolon -