In molecular genetics, a point mutation is caused by the substitution of one nucleotide for another. In classical genetics, point mutation refers to any mutation that is not associated with a cytologically detectable chromosomal aberration or one that has no effect on crossing over.

Change of a single nucleotide in DNA, especially in a region coding for protein.

a mutation that occurs when one base pair along a chain of DNA is changed, usually in an exon, or region coding for a protein. There are three types of point mutation: substitution, deletion, and insertion.

a mutation resulting from a change in a single base pair in the DNA molecule, resulting from the substitution of one nucleotide for another.

mutation that can be mapped to one specific site within a locus. A small mutation that consists of the replacement ( transition or transversion); addition; or deletion ( frameshift) of one or a few bases.

A mutation affecting only one nucleotide site. Usually, in reference to a nucleotide substitution.

A mutation that results from a small, localized alteration in the chemical structure of a gene. Such mutations can give rise to wild-type revertants as a result of reverse mutation. In genetic crosses, a point mutation behaves as if it resided at a single point on the genetic map. (Contrast with deletion.)

In genetics, a permanent, heritable change in a single nucleotide sequence of a gene.

a mutation due to an intramolecular reorganization of a gene

a mutation in which one "letter" of the genetic code is changed to another

The substitution of one nucleotide for another nucleotide amino acid on a gene.

POYNT mu-TAY-shun A change in a single DNA base. 341

substitution of a single nucleotide with a different nucleotide.

substitution of one DNA base pair for another

A mutation which maps to a specific locus.

A change in a single nucleotide of the genome, occurring in 1 percent or less of the population. Also see single-nucleotide polymorphism.

A mutation in a single base pair within a DNA molecule.

damage to a single base or its substitution by another base.

(Also called cosmic ray mutations). This form of mutation is a random change from one instruction to another in the memory space of a creature. This can occur at any time and is not limited to whether the creature is executing a particular task, or even executing at all.

A mutation in which a single nucleotide in a DNA sequence is substituted by another nucleotide.

a substitution of single base pair in nucleic acid sequences.

As used in this database, point mutation refers to a single base-pair change.

An alteration in DNA sequence caused by a single nucleotide base change, insertion, or deletion

The substitution of a single DNA base in the normal DNA sequence.

A change in a single base pair of a DNA sequence in a gene

Single base change in DNA.

A single change in a base pair sequence. Such small changes can sometimes cause a gene to loose or change its function. See also: Mutation.

A type of mutation that involves changing a single base in a DNA sequence.

A mutation that can be mapped to one specific locus.

Reaction that changes a single base pair in DNA.

Substitution of one nucleotide for another within a gene resulting in a missense, nonsense, or splice mutation.

A point mutation, or substitution, is a type of mutation that causes the replacement of a single base nucleotide with another nucleotide. Often the term point mutation also includes insertions or deletions of a single base pair (which have more of an adverse effect on the synthesized protein due to nucleotides still being read in triplets, but in different frames- a mutation called a frameshift mutation).