BRAINCAKEMutations
A mutation is a change in the sequence of bases in DNA.
If the mutation occurs within a gene then the protein synthesised may be affected. The mutation may be a substitution, deletion or insertion (addition).A mutation affecting only one nucleotide is called a point mutation.
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Key terms in this lesson
- Codon
- A sequence of three bases on mRNA that codes for a specific amino acid or a stop signal.
More in Genetics and Variation
- The Genetic Code
- Effects of Mutations
- Change in Protein Function
- Sickle-cell Anaemia
- Causes of mutations
- Chromosome Mutations
- Gene Regulation
- Controlling Transcription
All 36 lessons in Genetics and Variation · All OCR A-level Biology topics