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Cambridge IGCSE Biology practice

Paper 3 structured question: Selection

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Selection

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Paper 3Theory (Core)2 marks

Selective breeding is used to improve crop plants and domesticated animals by choosing parents with desirable traits over several generations.

Description

Selective Breeding Process

Farmers select plants or animals with specific desirable characteristics and breed them. The offspring with the best traits are then selected for further breeding. This process is repeated over many generations to enhance these traits.

  1. a

    State what is selective breeding?

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify one example of selective breeding in crop plants or domesticated animals.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Selection

Paper 3Theory (Core)2 marks

Description

Selective Breeding in Agriculture

Farmers select plants or animals with beneficial traits and breed them. The offspring showing the best traits are selected again for breeding. This process continues over several generations to improve the population.

  1. a

    State why is selective breeding repeated over many generations?

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify one trait that might be improved in crop plants by selective breeding.

    Aim for approximately 1 distinct marking point.

    [1]