| 单词 | mutation |
| 释义 | mutation (once / 3537 pages) n A mutation is a genetic change that causes new and different characteristics, like the mutation on the dog's DNA that makes its tail shorter than its ancestors' tails. Mutation comes from the Latin word mutationem meaning "a changing." You might recognize this root in related words like mutate, mutable, and mutant. We often think of mutations as changes in an animal's genetic structure, but there are other kinds of mutations. For example, if an architect designs an award-winning building, her later designs that are similar might be called mutations of that one. WORD FAMILYmutation: mutational, mutations+/mutate: mutated, mutates, mutating, mutation USAGE EXAMPLESA few rare genetic mutations break the thermostat. New York Times(Dec 27, 2016) But there’s a problem with that picture: some mutation is good for our mitochondria. Nature(Dec 19, 2016) The FDA also approved a companion test that screens for the mutation. Washington Times(Dec 19, 2016) 1n a change or alteration in form or qualities Hyper alteration, change, modification an event that occurs when something passes from one state or phase to another 2n (genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism Syn|Hypo|Hyper chromosomal mutation, genetic mutation 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 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 alteration, change, modification an event that occurs when something passes from one state or phase to another 3n (biology) an organism that has characteristics resulting from chromosomal alteration Syn|Hypo|Hyper mutant, sport, variation freak, lusus naturae, monster, monstrosity a person or animal that is markedly unusual or deformed leviathanthe largest or most massive thing of its kind being, organism a living thing that has (or can develop) the ability to act or function independently |
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