selective breeding

• what features would organism be selectively bred for?

  • max yield of meat, milk or grain
  • good health and disease resistant
  • temperament, speed, fertility, good mothering skills
  • (in plants) - attractive flowers, nice smell
• how does selective breeding take place?

  • from your existing stock - select best organisms with best characteristics
  • breed them with each other
  • select the best of the offspring and breed them together
  • continue the process for several generations and the desired trait gets increasingly stronger