| 释义 |
chromosomal mutation
Thesaurus| Noun | 1. | chromosomal mutation - (genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organismgenetic mutation, mutationgenetic science, genetics - the branch of biology that studies heredity and variation in organismsalteration, 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 chromosomeinversion - (genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversedtransposition - (genetics) a kind of mutation in which a chromosomal segment is transfered to a new position on the same or another chromosomemutagenesis - an event capable of causing a mutationgene mutation, point mutation - (genetics) a mutation due to an intramolecular reorganization of a genereversion - (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 |
chromosomal mutation
chromosomal mutation changes to the chromosome complement or structure of cells or organisms. There are two major types: - numerical, affecting whole chromosomes (see POLYPLOID and ANEUPLOIDY), and
- structural, affecting genetic arrangement within chromosomes. These are usually of a fairly major type (compare POINT MUTATION) and often cause severely adverse effects. Such structural mutations are classified into various types:
- inversion, the rearrangement of a chromosomal segment so that it has the reverse sequence, e.g. ABCDE ----> ADCBE;
- deletions, the removal of a segment;
- duplication, the repeating of a segment either next door to the original or elsewhere along the chromosome;
- translocation, the exchange of segments between nonhomologous chromosomes.
chromosomal mutation
Related to chromosomal mutation: gene mutationSynonyms for chromosomal mutationnoun (genetics) any event that changes genetic structureSynonymsRelated Words- genetic science
- genetics
- alteration
- change
- modification
- deletion
- inversion
- transposition
- mutagenesis
- gene mutation
- point mutation
- reversion
- saltation
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