Asexual Reproduction

• Asexual reproduction


  • the process that results in the production of genetically identical offspring from one parent, without the fusion of gametes.
  • Gametes are sex cells that are produced by the reproductive organs. Examples are the sperm and eggs.
• Mitosis 


  • a type of cell division giving rise to genetically identical cells in which the chromosome number is maintained.
  • Cells divide by mitosis during organism growth and tissue repair
  • New cells replace worn out cells to perform function of old cell
  • Parent cell:

  • Four chromosomes

  • DNA replication

  • Doubling of the chromosomes

  • X-shaped chromosomes

  
  

  • Daughter cells:

  • Identical to parent cell

  • Identical to each other

  • Same chromosomes

  • Same genes
• Advantages of Asexual Reproduction


  • only one parent is required
  • fusion of nuclei of gametes not required
  • all beneficial qualities are passed on to offspring
  • faster than sexual reproduction

  
• Disadvantages of Asexual Reproduction

  • No genetic variation in offspring, species not well-adapted to changes in environment
  • E.g. If parent does not have resistance to particular disease, offspring will also not have resistance. So, the whole population could be wiped out by the disease