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倍体

网络diploid; ploidy; tetraploid

倍体

网络释义

倍体

diploid

体细胞为2倍体（diploid）以2n表示，还有一些物种的染色体成倍增加成为4n、6n、8n等，称为多倍体。染色体的数目因物种而 …

ploidy

倍体(ploidy)是指一组染色体一定的倍数或一组染色体变异的情况 ,如二倍体(2N) 、三倍体(3N) 、四倍体(4N)等〔 1〕。单倍体(…

tetraploid

(dimethyallylamino - 免费文档下载 ... tetramer 聚体 tetraploid 倍体 tetrapolar species 极种 ...

triploid

(dimethyallylamino - 免费文档下载 ... triplex 式型 , 显性组合 triploid 倍体 Tripsacum 囊草[属] ...

haploid

...loid）是指细胞核中具有一个染色体组，而单倍体（haploid）是指其细胞核内所含的染色体数与该物种配子中所含的染色体 …

aneuploid

倍体 (aneuploid)。

aneuploidy

b. 细胞遗传物质不公平分配后会产生无倍体 (aneuploidy) 及四倍体 (tetraploidy) 细胞. 使用基因击倒术发现 p53 基因缺失造成癌 …

例句：

hemizygous Describing genetic material that has no homologous counterpart and is thus unpaired in the diploid state.

是一类没有同源配对物的，因此在二倍体中不成对的遗传物质。

Homozygote (homozygous) --- An individual or genotype with identical alleles at a given locus on a pair of homologous chromosomes .

在二倍体生物中，一对同源染色体上特定的基因座上有两个相同的等位基因的个体或细胞。

Fungi have two or more mating types, and only cells of different mating type combine to produce diploid cells.

真菌有两个或两个以上的交配类型，只有细胞的不同交配型相结合，产生二倍体细胞。

Chromosomal instability leads to a condition known as aneuploidy , in which chunks of DNA are either missing or duplicated .

染色体的不稳定就会导致非整倍体的发生，这样 DNA 的记忆单位就会丢失或重复。

To overcome this problem , experimental induction of haploidy has been used in fish .

为了解决这个问题，在鱼类中用实验手段诱导了单倍体。

There is an alternation of diploid and haploid generations . Often one of these is much reduced and may not live independently .

具二倍体和单倍体的世代交替，二倍体或单倍体常过度简化而不能独立生活。

Chromosome numbers which deviate from the normal number of chromosomes for a species are said to be heteroploid .

偏离了一个物种的整个染色体数目的叫做导倍体。

Diploid - Having two copies of every chromosome , one from each parent .

二倍体 -有两个副本，每一个染色体，分别来自父亲和母亲。

Polyploids can arise by somatic doubling, by the fusion of unreduced gametes, and by means of a triploid bridge .

多倍体产生与体细胞染色体的加倍、未减数配子的融合以及一种叫三倍体桥的方法。

In lung adenoma , the decrease in the expression of EC has no relatoin with the TNM stage , lymph node metastasis, and DNA ploidy .

肺腺癌中 EC 表达下调与其分化程度，TNM 分期，淋巴结转移和 DNA 倍体无关。

Meiosis comprises a pair of specialized nuclear divisions that produce haploid germ cells .

减数分裂由两次产生单倍体生殖细胞的核分裂组成。

Under the general term genetic system we include the modes of reproduction of the species (bisexual, thelytokous, haploid, etc. ).

我们在总遗传系统中包括种的繁殖方式（两性的，产雌单性生殖的，单倍体等）。

Euploidy The normal state in which an organism's chromosome number is an exact multiple of the haploid number characteristic of the species .

正常状态下，生物体染色体数是此种生物单倍体数目整数倍的现象被称为整倍性。

these forms are highly sterile , as would be expected of triploids and of autotetraploids derived from basic diploids.

这些类型都是高度不育的，正如由基本的二倍体衍生三倍体和同源四倍体一样。

An aneuploid state in which a third homologous chromosome is present in addition to the normal autosomal pair is called trisomy .

除了正常染色体对以外，还存在有第二种同源染色体的非整倍体状态，被称为三体性。

The number of chloroplast and chlorophyll content in the dodecaploid are more than hexaploid , stomatal density are lower than hexaploid.

同时，十二倍体较六倍体的叶绿体数目明显增多，叶绿素含量提高，但气孔密度减小。

In cytogenetics , mosaicism is also sometimes referred to as mixoploidy .

在细胞遗传学中，镶嵌性有时也称为混倍体。

Early cancers could also be distinguished from morphologically identical benign tumors by checking for aneuploidy .

检测非整倍体的存在与否，也可区分早期的癌细胞与外型相同的良性肿瘤。

Sexual reproduction The formation of new individuals by fusion of two nuclei or sex cells ( GAMETES ) to form a diploid ZYGOTE .

新的个体是由两个细胞核或性细胞（配体）融合形成二倍体受精卵发育而成。

were obtained due to the chromosome elimination of pollen parent quickly and completely during the heterozygote development .

利用杂合子发育过程中来自父本的染色体完全、迅速地消失得到大量单倍体胚。

Synergid cells Two haploid cells located near the egg cell at the micropylar end of the embryo sac in flowering plants .

存在于开花植物胚囊内，是位于珠孔端的卵细胞两侧的两个单倍体细胞。

Tetraploid induction from double haploid was also studied, and a desirable result has been obtained .

双单倍体诱导纯合四倍体的加倍试验获到了较理想的结果。

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