IGCSEBiology: Double ScienceEdexcelRevision Notes3. Reproduction & InheritanceInheritance3.34 Mutation

Mutation (Edexcel IGCSE Biology: Double Science)

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Mutations

  • Mutations are rare, random changes that occur in the sequence of DNA bases in a gene or a chromosome
  • Mutations occur continuously
  • As the DNA base sequence determines the sequence of amino acids that make up a protein, mutations in a gene can sometimes lead to a change in the protein that the gene codes for
  • Most mutations do not alter the protein or only alter it slightly so that its appearance or function is not changed
  • There are different ways that a mutation in the DNA base sequence can occur

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    Lára

    Author: Lára

    Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.