selective breeding

• selective breeding involves humans choosing organisms with a desired phenotype

  these organisms are allowed to breed and produce offspring

  the process is repeated for several generations
• how to use selective breeding ; example question:

  • the specific phenotype you want
  • the other phenotype you want
  • you would breed them together
  • make offspring with desired phenotype
  • repeat breeding for generations
• describe two differences between selective breeding and natural selection?

  1 - selective breeding involves humans

  2 - selective breeding is faster
• example question: how does factory farming effect egg production?

  • chickens inside have less space so have less movement
  • this leads to less respiration
  • more energy left over to produce eggs
• describe the process of selective breeding?

  1. humans select two crops
  2. that have a particular phenotype
  3. breed them together to make an offspring with a desired phenotype
  4. repeat for generations