二倍体

In angiosperms, a diploid embryo may develop from a cell of the nucellus or chalaza; this is also apospory.

在被子植物中。二倍体的胚胎可以从珠心或合点的细胞发育而来，这也可以被称为无孢子生殖。

In all plants and some algae there is an alternation between sexual haploid and asexual diploid stages.

在所有的高等植物和一些藻类会出现有性的单倍体阶段和无性的二倍体阶段交替的现象。

Blood samples from 23 Huacaya alpacas ,3 males and 20 females ,were used to study chromosome karyotype ,so as to provide some effective cytogenetics basis for the selectioiymprovement by crossing and disease diagnosis of alpacas ,and genetic mechanisms of sex determination. Peripheral blood lymphocyte culture was used to prepare chromosome. Methods of trypsase-EDTA and BSG (Barium hydroxide / Saline / Giemsa)were used for G-banding and C-banding respectively . The results showed as follows:Firstly , the number of diploid chromosomes was in the alpacas 2n=74,with the karyotype 74, XY and 74, XX for males and females respectively.

为了从选种、杂交改良、疾病诊断以及性别决定的遗传机制等方面为羊驼的繁育与推广提供更为有效的细胞遗传学资料，本试验采用外周血淋巴细胞培养法制备染色体，分析了23只胡阿基亚型羊驼(Huacaya alpaca，雌20只，雄3只)的染色体及其核型，并通过BSG法(Barium hydroxide／Saline／Giemsa，氢氧化钡-盐溶液-吉姆萨，也即Sumner BSG法)与胰酶-EDTA法分别对羊驼的C-分带和G-分带进行分析，结果表明：(1)羊驼二倍体染色体数目为2n=74，雄性羊驼核型为74，XY；雌性羊驼核型为74，XX。

The cells of the blastula called blastomeres also each receive a full diploid set of chromosomes.

这些囊胚细胞，称卵裂球，每个细胞都有一套二倍体染色体组。

A non-segregating F2 population derived from the cross of triploid × diploid in rice. Acta Botanica Sinica.

从农艺性状和分子标记鉴定一个水稻三倍体×二倍体群体的遗传稳定性。

Analogous cascades are found in higher organisms, and are compared with the yeast cascade later

由单倍体种群形成稳定的二倍体产物可以被认为是转变存在的理由。

Having a diploid set of chromosomes derived from each parent.

双二倍体的具有从父母''。'双亲'。''获得的两套染色体的

These culture conditions not only maintain the undifferentiated state and normal diploid karyotypes of BALB/c mouse ES cells effectively, but also maintain a series of their characteristics of murine stem cells. two different kinds of digestive methods and Two kinds of digestive juice with different concentrations were designed to dissociate proliferous inner cell mass and ES cell clonies deriver from dissociative ICM.

这一培养条件不但有效地维持了ES细胞的未分化状态和正常二倍体核型，而且维持了其作为多能性胚胎干细胞的一系列特征；实验设计了两种离散方法和两种浓度的消化液，用来离散增殖的ICM和ICM离散后出现的ES集落。

The over expression of p16 gene contributes to the process of cellular senescence of normal human diploid fibroblasts.

p16在人二倍体成纤维细胞的衰老过程中起促进作用。

Our method illustrates for the first time that diploid C.

我们的方法首次证明通过选择得到的个体大的二倍体太平洋牡蛎

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。