point mutation

noun, Genetics.
1.
a change in a single base in a nucleotide sequence.
Origin
1920-25
Examples from the web for point mutation
  • In a point mutation, a single letter of the genetic code changes to another letter.
point mutation in Medicine

point mutation n.
A mutation that involves a single nucleotide and may consist of loss of a nucleotide, substitution of one nucleotide for another, or the insertion of an additional nucleotide.

point mutation in Science
point mutation  
A mutation in which one nucleotide is added, deleted, or replaced by another. Point mutations include missense, nonsense, frameshift, and silent mutations.