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  • Created by: Owain
  • Created on: 03-01-13 16:41


  • Mutations are changes in the DNA of genes.
  • Mutations occur at random.
  • Some mutations are beneficial (helpful).
  • Some mutations are harmful.
  • Ionising radiation (Alpha, Beta and X Rays) increasing the rate of mutations.
  • The greater the dose of the radiation, the greater the chance of mutation.

Cystic Fibrosis

  • Some mutations cause conditions which can be inherited.
  • Cystic fibrosis is an inherited disease.
  • Sufferers from cystic fibrosis produce thick mucus which blocks bronchioles.
  • It arises as a mutation.
  • It is inherited as a recessive allele

If the allele for…



This is great. A really good resource

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