| 释义 |
alleleenUK
al·lele A0207900 (ə-lēl′)n. Any of the alternative forms of a gene or other homologous DNA sequence. Also called allelomorph.
[German Allel, short for Allelomorph, allelomorph, from English allelomorph.]
al·le′lic (ə-lē′lĭk, ə-lĕl′ĭk) adj.al·le′lism n.allele (əˈliːl) or alleln (Genetics) any of two or more variants of a gene that have the same relative position on homologous chromosomes and are responsible for alternative characteristics, such as smooth or wrinkled seeds in peas. Also called: allelomorph See also multiple alleles[C20: from German Allel, shortened from allelomorph, from Greek allēl- one another + morphē form] alˈlelic adj alˈlelism nal•lele (əˈlil)
n. one of two or more alternative forms of a gene occupying the same position on matching chromosomes: an individual normally has two alleles for each trait, one from either parent. [1930–35; < German Allel, appar. as shortening of German equivalents of allelomorph or allelomorphic gene] al•lel•ic (əˈli lɪk, əˈlɛl ɪk) adj. al•lel′ism, n. al·lele (ə-lēl′) Any of the possible forms in which a gene for a specific trait can occur. In almost all animal cells, two alleles for each trait are inherited, one from each parent. Alleles on each of a pair of chromosomes are called homozygous if they are similar to each other and heterozygous if they are different.Thesaurus| Noun | 1. |  allele - (genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same character; "some alleles are dominant over others"allelomorphcistron, gene, factor - (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity; "genes were formerly called factors"dominant allele, dominant - an allele that produces the same phenotype whether its paired allele is identical or differentrecessive, recessive allele - an allele that produces its characteristic phenotype only when its paired allele is identicalgenetic science, genetics - the branch of biology that studies heredity and variation in organisms |
TranslationsalleleenUK
allele [ah-lēl´] one of two or more alternative forms of a gene at the same site in a chromosome, which determine alternative characters in inheritance. adj., adj allel´ic.silent allele one that produces no detectable effect.al·lele (ă-lēl'), Avoid the mispronunciations al-ĕl' and al'ēl.Any one of a series of two or more different genes that may occupy the same locus on a specific chromosome. As autosomal chromosomes are paired, each autosomal gene is represented twice in normal somatic cells. If the same allele occupies both units of the locus, the individual or cell is homozygous for this allele. If the alleles are different, the individual or cell is heterozygous for both alleles. See: DNA markers.
See also: dominance of traits. Synonym(s): allelomorph [G. allēlōn, reciprocally] allele (ə-lēl′)n. Any of the alternative forms of a gene or other homologous DNA sequence. Also called allelomorph.
al·le′lic (ə-lē′lĭk, ə-lĕl′ĭk) adj.al·le′lism n.allele One of two or more alternate form of a gene, which results in different gene products; any one of two or more variants of a gene that occupy the same position (locus) on a chromosome, which may differ in nucleotide sequence, but not substantively in function or effect.
In eukaryotic cells, alleles exist in pairs—usually one allele is contributed by each parent. The phenotypic expression of an allele is a function of whether the gene is dominant (in which case only one allele is needed for expression) or recessive (requiring that both alleles be the same for expression of a trait). Autosomal chromosomes are paired and each locus is represented twice; the presence of identical alleles on the same locus are said to be homozygous; the presence of two different alleles on the same locus are heterozygous.allele Genetics An alternate form of a gene, which results in different gene products; any one of 2 or more variants of a gene that occupy the same position–locus on a chromosome, which may differ in nucleotide sequence, but not substantively in function or effect. See Amorphic allele, Pseudoallele allele, Reeler allele, Wimp allele. al·lele (ă-lēl') Any one of a series of two or more different genes that may occupy the same locus on a specific chromosome. As autosomal chromosomes are paired, each autosomal gene is represented twice in normal somatic cells. If the same allele occupies both units of the locus, the individual or cell is homozygous for this allele. If the alleles are different, the individual or cell is heterozygous for both alleles.
See also: DNA markers
Synonym(s): allelomorph. [G. allēlōn, reciprocally]allele Short for allelomorph. 1. Genes that occupy corresponding positions (HOMOLOGOUS loci) on homologous chromosomes. Humans have two, usually identical, alleles for each gene, one on each AUTOSOMAL chromosome of a pair. 2. One of the ways in which a gene, at a particular location on a chromosome, may differ in its DNA sequence from the normal or from its fellow at the corresponding location on the other chromosome. If different alleles of a gene occur at the corresponding sites on the pair of chromosomes the individual is said to be HETEROZYGOUS for the gene. If the two alleles are abnormal in the same way, the individual is HOMOZYGOUS and the characteristic determined by the gene defect will be present. Heterozygous individuals will show the features of the DOMINANT gene. The other allele is RECESSIVE. The term derives from the Greek allos , another. allele a particular form of GENE. Alleles usually occur in pairs, one on each HOMOLOGOUS CHROMOSOME in a DIPLOID cell nucleus. When both alleles are the same the individual is described as being a HOMOZYGOTE; when each allele is different the individual is a HETEROZYGOTE. The number of allelic forms of a gene can be many (MULTIPLE ALLELISM), each form having a slightly different sequence of DNA bases but with the same overall structure. Each diploid can, however, carry only two alleles at one time. See also DOMINANCE (1).genotypeThe complete genetic constitution of an individual at a particular location (locus) in the genome. At many locations (loci) throughout the genome, the chromosomal DNA sequence differs subtly between individuals. Each of the various DNA sequences at one locus is called an allele: for instance, if there are three sequence variants present, then there are three alleles. Offspring inherit one homologous chromosome from each parent. Thus, a genotype comprises two alleles: the allele inherited from the father (carried on the paternal chromosome) and the allele inherited from the mother (carried on the maternal chromosome). See gene; phenotype.al·lele (ă-lēl') Any one of a series of two or more different genes that may occupy the same locus on a specific chromosome. [G. allēlōn, reciprocally]alleleenUK
Related to allele: Dominant allele, multiple allele, Recessive alleleSynonyms for allelenoun (genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same characterSynonymsRelated Words- cistron
- gene
- factor
- dominant allele
- dominant
- recessive
- recessive allele
- genetic science
- genetics
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