请输入您要查询的英文单词:

 

单词 heterozygosity
释义

heterozygosity

enUK

het·er·o·zy·gous

H0179250 (hĕt′ər-ə-zī′gəs)adj.1. Having different alleles at one or more corresponding chromosomal loci.2. Of or relating to a heterozygote.
het′er·o·zy·gos′i·ty (-ə-rō-zī-gŏs′ĭ-tē) n.

heterozygosity

(ˌhɛtərəʊzaɪˈɡɒsɪtɪ) n (Biology) the condition of being a heterozygote
Thesaurus
Noun1.heterozygosity - the state of being heterozygous; having two different alleles of the same genestate - the way something is with respect to its main attributes; "the current state of knowledge"; "his state of health"; "in a weak financial state"homozygosity - the state of being homozygous; having two identical alleles of the same gene

Heterozygosity

enUK

Heterozygosity

 

the state, inherent in every hybrid organism, in which homologous chromosomes carry different forms (alleles) of a given gene or differ in the arrangement of genes (structural heterozygosity).

The term “heterozygosity” was first introduced by the English geneticist W. Bateson in 1902. Heterozygosity is the result of the union of gametes of different genetic or structural makeup. Structural heterozygosity arises with the chromosomal rearrangement of one of the homologous chromosomes; it may be detected in meiosis or in mitosis. Heterozygosity is revealed by crossing a hybrid with its homozygous-recessive parental form. Heterozygosity, as a rule, is a consequence of the sexual process, but it can arise as a result of mutation (for example, in the homozygote AA, where one of the alleles has mutated: A→A’). The effect of harmful or lethal recessive alleles is suppressed in a heterozygote by the presence of the corresponding dominant allele and becomes apparent only with the transfer of the allele to a homozygous situation. Heterozygosity is widespread in natural populations and is apparently one of the reasons for hybrid vigor (heterosis). The masking action of the dominant alleles in heterozygosity allows the preservation and diffusion through a population of harmful recessive alleles, which should be unmasked in the course of breeding and selection as well as in making medical and genetic prognoses (for example, through evaluative testing of a stock by studying its progeny).

REFERENCES

Brewbaker, G. L. Sel’skokhoziaistvennaia genetika. Moscow, 1966. (Translated from English.)
Lobashov, M. E. Genetika, 2nd ed. Leningrad, 1967.
Efroimson, V. P. Vvedenie v meditsinskuiu genetiku, 2nd. ed. Moscow, 1968.

IU. S. DEMIN

heterozygosity

enUK

heterozygosity

 [het″er-o-zi-gos´ĭ-te] the state of having different alleles in regard to a given character. adj., adj heterozy´gous.

het·er·o·zy·gos·i·ty

, heterozygosis (het'ĕr-ō-zī-gos'i-tē, -zī-gō'sis), The state of being heterozygous. [hetero- + G. zygon, a yoke]

het·er·o·zy·gos·i·ty

, heterozygosis (het'ĕr-ō-zī-gos'i-tē, -zī-gō'sis) The state of being heterozygous. [hetero- + G. zygon, a yoke]

heterozygosity

The state of possessing two different ALLELES for one or more genes. Loss of heterozygosity from all the abnormal cells in a lesion indicates monoconal proliferation and is a molecular marker of neoplasia.

heterozygosity

enUK
Related to heterozygosity: Loss of heterozygosity
  • noun

Antonyms for heterozygosity

noun the state of being heterozygous

Related Words

  • state

Antonyms

  • homozygosity
随便看

 

英语词典包含2567994条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2025/3/4 11:44:24