174 results found

Search Results for: mutation

Missense mutation

What is a missense mutation? Literally speaking, a mutation that changes the meaning of the encoded gene sequence is the... Read More

Silent mutation

A mutation is a change in the nucleotide sequence of a gene or a chromosome. When there is only one nucleotide involved, it... Read More

Frameshift mutation

Define Frameshift Mutation What is a frameshift mutation? In biology, insertions or deletions of nucleotides in the coding... Read More

Mutation

Mutation is a permanent, heritable change in the nucleotide sequence or the process by which such a change occurs in a gene... Read More

Chromosomal mutation

Every living thing is made up of DNA. Our DNA is what makes us unique and different in the world. Our DNA is made up of... Read More

Lethal mutation

Lethal Mutation Definition Genetic mutations come from changes in the DNA structure or sequencing in an organism. Often... Read More

Neutral mutation

Neutral Mutation Definition What is a neutral mutation? Neutral mutations are the alterations in the DNA that are... Read More

Hypermorphic mutation

Definition noun (genetics) A type of mutation wherein the change in gene leads to an increase in normal (wild-type) gene... Read More

Amorphic mutation

Definition noun (genetics) A type of mutation wherein the change in gene leads to the loss of the normal (wild-type) gene... Read More

Point mutation

Definition noun, plural: point mutations (genetics) A small-scale mutation characterized by a change of only one nucleotide... Read More

Substitution mutation

Definition noun, plural: substitution mutations (genetics) A small-scale mutation characterized by a substitution of one or... Read More

Hypomorphic mutation

Definition noun (genetics) A type of mutation wherein the change in gene leads to the partial loss of the normal... Read More

Neomorphic mutation

Definition noun (genetics) A type of mutation wherein the change in gene leads to an atypically new function of the... Read More

Nonsense mutation

Definition noun, plural: nonsense mutations A form of point mutation resulting in a nonsense codon that does not code for an... Read More

Small-scale mutation

Definition noun, plural: small-scale mutations (genetics) A type of mutation characterized by a change of one or few... Read More

Antimorphic mutation

Definition noun (genetics) A type of mutation wherein the change in gene alters the activity of the gene such that it... Read More

Large-scale mutation

Definition noun, plural: large-scale mutations (genetics) A type of mutation several nucleotides of a gene within a large... Read More

Chromosome Mutations

Reviewed by: Mary Anne Clark, Ph.D. By nature, the genetic information from both parents is expected to be seen... Read More

Genetic Mutations

Reviewed by: Mary Anne Clark, Ph.D. Genetic Mutations Genetic mutations are inherited variations in an... Read More

Deletion mutation

Definition noun, plural: deletion mutations (genetics) A type of mutation wherein one or few nucleotide base pairs are... Read More

Chromosome Mutations – II

Reviewed by: Mary Anne Clark, Ph.D. This page is a continuation of the previous tutorial, Chromosome Mutations... Read More

Mutagen

Mutagen Definition What is a mutagen? A mutagen is a substance or agent that causes DNA impairment that results in the... Read More

Duplication mutation

Definition noun A type of mutation in which a portion of a genetic material or a chromosome is duplicated or replicated,... Read More

Natural mutation

natural mutation --> spontaneous mutation A mutation which occurs by itself without first being affected by a mutagen,... Read More

Forward mutation

Forward mutation Any mutation which renders a formerly functional gene nonfunctional. Compare: back... Read More

FAAH-OUT mutation for a life of no pain – No FAAH, no pain

A Scottish woman claims that she has not experienced pain over some supposedly painful conditions, like a severe joint... Read More

Transversion

Definition noun, plural: transversions (genetics) A small-scale mutation characterized by the replacement of a purine by... Read More

Unstable mutation

unstable mutation (Science: molecular biology) A mutation that has a high likelihood of reverting to its original... Read More

Transition mutation

transition mutation A point mutation involving substitution of one base-pair for another, i.e., replacement of one purine... Read More

Conditional mutation

Conditional mutation (Science: molecular biology) a mutation that is only expressed under certain environmental conditions... Read More

Spontaneous Mutation

A 'naturally' occurring mutation in the absence of a mutagen that would otherwise be a known factor for inducing a... Read More

Down promoter mutation

Down promoter mutation (Science: molecular biology) a mutation (a change in base pair sequence) in a promoter region, this... Read More

Up mutation

up mutation (Science: molecular biology) refers to any mutation in the promoter region of a gene which can trigger... Read More

Transition

Definition noun, plural: transitions (genetics) A small-scale mutation characterized by the replacement of a purine by... Read More

Pleiotropy

Pleiotropy Definition When one single gene starts affecting multiple traits of living organisms, this phenomenon is known... Read More

Insertion (genetics)

In genetics, insertion refers to the type of mutation characterized by the insertion of one or few nucleotide base pairs to... Read More

Induced Mutation

A mutation that is deliberately introduced via... Read More

Mosaicism

Cells often go through many divisions before they become a part of an organism’s genetic make-up. This leaves room for... Read More

Polymorphism

Polymorphism Definition The occurrence of two or more different forms or morphs in the population of a species is referred... Read More

Fluctuation test

Fluctuation test (Science: investigation) test devised by Luria and Delbruck to determine whether genetic variation in a... Read More