Selective breeding

• What is selective breeding?


  Where specific plants or animals are chosen and bred together to enhance desirable traits.
• How does breeding work?


  Select the two you want to breed (the best in the generation) then breed them this happens again and again.
• What are the drawbacks to breeding?

  • Reduces the collection of different alleles in the population
  • Inbreeding - prone to disease or inherited defects
  • Less variation
• What type of variation can be passed on to the next generation?

  Genetic variation
• What effect does selective breeding usually have on variation within a population?


  Decreases variation
• What is the term used to describe all the genes and their alleles found in a population?


  Gene pool
• What is the term used to describe the breeding together of closely related individuals?

  Inbreeding
• What are the drawbacks of inbreeding?

  • it reduces that size of the gene pool
  • The population as a whole will be more at risk of disease
  • Rare inherited diseases are more likely to appear