The Cause of Mutations
Mutations are a random occurrence during DNA replication and the rate of mutation is influenced by external factors such as UV radiation. Mutation occurs spontaneously.
There are different types of mutation:
1. Deletion where one or more nucleotide bases are deleted. AGTCA becomes AGCA
2. Substitution where one or more nucleotide bases are replaced by others. AGTCA becomes AGTCG
3. Addition where one or more nucleotide bases are added as extra. AGTCA becomes ATGTCA
4. Inversion where a section of DNA is inverted e.g. AGTTCATTCCAGG becomes…