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  • IGCSE Biology - 3b Inheritance - Variation and Mutation

IGCSE Biology - 3b Inheritance - Variation and Mutation

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New Edexcel IGCSE 9-1 4BI1 syllabus for 2017 first examined in 2019


Section 3b Inheritance - Variation and Mutation


  • 3.33 understand that variation within a species can be genetic, environmental, or a combination of both
  • 3.34 understand that mutation is a rare, random change in genetic material that can be inherited
  • 3.35B understand how a change in DNA can affect the phenotype by altering the sequence of amino acids in a protein
  • 3.36B understand how most genetic mutations have no effect on the phenotype, some have a small effect and rarely do they have a significant effect
  • 3.37B understand that the incidence of mutations can be increased by exposure to ionising radiation (for example, gamma rays, x-rays and ultraviolet rays) and some chemical mutagens (for example, chemicals in tobacco)


New and updated resource for IGCSE 9-1- More practical pages, updated design, concept checker and exam style question for each topic.

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  • Home
  • Revision Courses
  • GCSE (9-1)
    • Topic 8
    • Topic 9
  • IGCSE (9-1)
    • 1 The nature and variety of living organisms
    • 2 Structures and functions in living organisms
    • 3 Reproduction and inheritance
    • 4 Ecology and the environment
    • 5 Uses of biological resources
    • IGCSE Revision Resources
  • Pre-U
    • 1 The Cell
    • 2 The Origin and Evolution of Life
    • 4 The Life of Plants
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