查询词典 chromosome number

In plants this is sometimes overcome by the doubling of the chromosome number, giving an allopolyploid.

在植物中，这种不育现象有时可因为染色体数目加倍而抵消，产生同源多倍体。

The F2 nullisomic amphidiploid with low chromosome number (2n=44-49) wasaccompanied with abnormal meiosis (7.45 Ⅰ+ 19.50 Ⅱ), but its fertility (19.2%) wasmuch higher than 〓's.

F2非整倍体的染色体数较低(2n=44-49)。

A cell or an organism characterized by an aneuploid chromosome number.

有多于单倍体两倍染色体的细胞或有机体。

Objective: To study Cassia nomame Kitag chromosome number,karyotype,volume.

目的：对辽宁分布的植物山扁豆的染色体数目、核型、体积等进行了研究。

For many species, chromosome number is a useful taxonomic character.

对许多物种来说，染色体数目是重要的分类学特征。

Organisms cell chromosome number and structure are important genetic markers,especially in eukaryotic cells.

生物体细胞的染色体数目和结构是生物体重要的遗传标志之一，特别是在真核细胞中。

The change of chromosome number is one of the characteristics of tumor cells. But the investigation of this mechanism is rare.

染色体数目畸变是肿瘤细胞的特征性表现之一，其发生机制至今未见有深入研究。

The chromosome number of the mutated tomato (2n=4x=48) was twice that of the control.

变异材料的细胞染色体(2n=4x=48)为二倍体材料的二倍。

Results indicated that suppression of malignancy was observed in the hybrid cells, they became differentiated morphologically and functionally by:(1) changes in histochemical staining, nucleus-cytoplasm in ratio, and increase in cell size and nucleal heterochromation, but decrese in cell surface microvilli and number of nucleoli;(2) decrease of growth rate, mitotic index and DNA synthesis rate;(3) loss of the ability to growth in soft agar medium, and non-tumorigenic under heterotransplantation to nude mice;(4) reduction of chromosome number mainly of rat derivative and decrease in chromosomal aberration rate.

实验结果表明：（1）杂交细胞出现瘤细胞与网织红细胞杂交同样的表型逆转及去恶性化特征，主要表现在细胞体积增大、核质比例减小；DNA合同速率降低、分裂指数下降，细胞生长显著减慢；在软琼脂中不形成集落，在裸鼠体内失去了长瘤能力。

Karyotypic findings showed that all cultivars were mixoploid with chromosome number ranging from 49 to 57, and 54 was the most frequent number observed.

结果表明：（1）17个栽培小菊均为混倍体，染色体数在49～57之间变异，以54条为主；（2）染色体呈现多态性：多数品种由中部、近中部和近端部着丝粒染色体组成；最长与最短染色体的比值为1.62～2.39；臂比＞2的染色体所占的比率为11.11%～29.62%；核型不对称系数为59.74%～63.37%；3个地被菊品种和'奥运橙光'、'金陵白凤'（2n=53）核型类型为&2B&，其它品种为&2A&型。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。