selective breeding

• selective breeding can be used to:

  • produce animals that make more meat or milk
  • produce crops with disease resistance
  • create docile dogs
  • create decorative plants
• 1. select animals with desired characteristics
  2. breed
  3. select offspring with desired characteristics and breed them together
  4. continue over several generations until all offspring have desired characteristic
• • selective breeding can be used to improve yields
• • selective breeding leads to inbreeding
  • number of different alleles in population are reduced
  • so, less chance of resistant alleles being present in population
  • inbreeding can cause health problems
  • higher chance of genetic defects
  • a new disease will harm population
  • not much variation in resistant alleles