Gene mutation key terms 0.0 / 5 ? BiologyBiological moleculesASEdexcel Created by: MaiaJayasuriyaCreated on: 26-01-18 13:11 Point mutation (gene mutation) A change in one or a small number of nucleotides affecting a single gene. 1 of 5 Substitution A type of point mutation in which one base in a gene is substituted for another. 2 of 5 Deletion A type of point mutation in which a base is completely lost. 3 of 5 Insertion A type of point mutation in which an extra base is added into a gene, which may be a repeat or a different base. 4 of 5 Mutagen Anything that increases the rate of mutation. 5 of 5
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