Mutations

Mutations

• 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…