What is a mutation that only changes in a single base in a sequence of DNA

Answer 1

A mutation that only changes a single base in a sequence of DNA is called a point mutation. This type of mutation can involve the substitution of one nucleotide for another, the insertion of an extra nucleotide, or the deletion of a nucleotide. Point mutations can have various effects on the resulting protein that is encoded by the mutated gene, including changing the amino acid sequence, altering protein function, or having no effect at all.