mutation(redirected from Null mutation)
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Related to Null mutation: frameshift mutation
1. The act or process of being altered or changed.
2. An alteration or change, as in nature, form, or quality.
a. A change in the nucleotide sequence of the genome of an organism or virus, sometimes resulting in the appearance of a new character or trait not found in the parental type.
b. The process by which such a change occurs, either through an alteration in the nucleotide sequence coding for a gene or through a change in the physical arrangement of the genetic material.
c. The nucleotide sequence, trait, or individual that results from such a change.
a. A change affecting a sound or a class of sounds, such as back vowels or plosive consonants, through assimilation to another sound, as in the process of umlaut.
b. A change affecting a sound or a class of sounds that is conditioned by morphological or syntactic factors rather than purely phonological factors, as in Irish, where certain words cause the lenition of the initial consonants of the following word.
[Middle English mutacioun, from Old French mutacion, from Latin mūtātiō, mūtātiōn-, from past participle of mūtāre, to change; see mutate.]
1. (Genetics) the act or process of mutating; change; alteration
2. a change or alteration
3. (Genetics) a change in the chromosomes or genes of a cell. When this change occurs in the gametes the structure and development of the resultant offspring may be affected. See also inversion11
4. (Genetics) another word for mutant1
5. (Genetics) a physical characteristic of an individual resulting from this type of chromosomal change
6. (Phonetics & Phonology) phonetics
a. (in Germanic languages) another name for umlaut
b. (in Celtic languages) a phonetic change in certain initial consonants caused by a preceding word
a. a sudden departure from the parent type in one or more heritable characteristics, caused by a change in a gene or a chromosome.
b. an individual, species, or the like resulting from such a departure.
2. the act or process of changing.
3. a change or alteration, as in form or nature.
4. a change in a speech sound caused by assimilation to a nearby sound, esp. umlaut.
[1325–75; Middle English < Latin]
A change in the genes or chromosomes of an organism. Mutations occurring in the reproductive cells, such as an egg or sperm, can be passed from one generation to the next. Most mutations have harmful effects, but some can increase an organism's ability to survive. A mutation that benefits a species may evolve by means of natural selection into a trait shared by all members. See Note at sickle cell anemia.
Mutationof thrushes: group of moulting birds.
1. Inheritable change in a gene‘s DNA.
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|Noun||1.||mutation - (biology) an organism that has characteristics resulting from chromosomal alteration|
organism, being - a living thing that has (or can develop) the ability to act or function independently
|2.||mutation - (genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism|
alteration, change, modification - an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"
deletion - (genetics) the loss or absence of one or more nucleotides from a chromosome
inversion - (genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed
transposition - (genetics) a kind of mutation in which a chromosomal segment is transfered to a new position on the same or another chromosome
mutagenesis - an event capable of causing a mutation
gene mutation, point mutation - (genetics) a mutation due to an intramolecular reorganization of a gene
reversion - (genetics) a return to a normal phenotype (usually resulting from a second mutation)
saltation - (genetics) a mutation that drastically changes the phenotype of an organism or species
|3.||mutation - a change or alteration in form or qualities|
1. The process or result of making or becoming different:
mutation[mjuːˈteɪʃən] N → mutación f
mutation[mjuːˈteɪʃən] n → mutation f
mutation[mjuːˈteɪʃ/ən] n → mutazione f
n. mutación, alteración, cambios espontáneos o inducidos en la estructura genética.