a change in a single base in a nucleotide sequence.
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.
A mutation in which one nucleotide is added, deleted, or replaced by another. Point mutations include missense, nonsense, frameshift, and silent mutations.
noun 1. Nautical. the precise location of a vessel, established in order to set a course, especially in beginning a voyage in open water. 2. a place to begin, as in a discussion, argument, etc.
noun 1. an issue that affects one’s honor, reputation, etc.: It was a point of honor with him to avenge any insult to his family.
- Point of fixation
point of fixation n. The point on the retina at which the light rays coming directly from an object are focused. Also called fixation point.
- Point of honour
noun (pl) points of honour 1. a circumstance, event, etc, that involves the defence of one’s principles, social honour, etc