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Cambridge IGCSE Biology practice

Paper 4 structured question: Variation

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Variation

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Paper 4Theory (Extended)1 marks

Gene mutation is a random alteration in the DNA base sequence.

Description

Gene Mutation

Gene mutation involves changes in the sequence of bases in DNA that occur randomly.

  1. a

    Identify what molecule's base sequence is altered in a gene mutation?

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Variation

Paper 4Theory (Extended)2 marks

Description

Gene Mutation

Gene mutation involves changes in the sequence of bases in DNA that occur randomly.

  1. a

    Describe what is meant by a gene mutation?

    Aim for approximately 2 distinct marking points.

    [2]