GCSE Biology (AQA)

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Selective Breeding

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Inheritance, Variation and Evolution Variation and Evolution

Selective Breeding

2:11 Selective Breeding
Spec 4.6.2.3
Previous Definition of Species Next Benefits of Selective Breeding
  • Selective breeding is a process where humans breed plants and animals for specific genetic traits.
  • Example: Breeding cows for larger udders to increase milk production.
  • Steps in selective breeding:
  • Choose parents with desired traits from a mixed population.
  • Breed these parents together.
  • Offspring will have mixed traits due to recessive genes and mutations.
  • Select offspring with the desired traits for further breeding.
  • Continue this process over many generations until all offspring exhibit the desired trait.
  • Humans have practiced selective breeding for thousands of years.
  • Selective breeding differs from genetic engineering, which involves direct DNA modification.
  • Early food crops and domesticated animals were developed from wild varieties through selective breeding.
  • Selective breeding aims to increase yield and profit.

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