次缢痕

其中常染色体平衡易位2例，臂间倒位2例，染色体次缢痕增大和G组短臂增加各1例。

Two cases were autosomal balanced translocation and two cases were pericentric inversion . The chromosome secondary constriction in one case became wider and the short arms of G team chromosomes in one case became longer .

次缢痕在第10对染色体长臂上，亦为C-带染色阳性，并与银染显示的标准NORs相一致。

A secondary constriction appears at a position on the long arm of chromosome No. 10.It is also the position of the " standard NORs " and C-banding positively stained .

丹麦长白猪Ag-NOR仅定位于第10号染色体短臂次缢痕区。枫泾猪、丹麦长白猪Ag-NOR颗粒数是有差别的。

Danish Landrace NORs were located on chromosome 10 . The number of Ag-NORs were difference between two breeds .

银染结果显示次缢痕部位为银集核仁组织者区（Ag－Nu－cleolusorganizerregion，Ag－NORs），并表现出数目和结构多态性。

The results of silver-staining indicate that the regions of secondary constrictions are nucleolus organizer regions ( Ag-NORs ), and it is shown that there are quantitative and structural polymorphism of Ag-NORs in the species .

第1对染色体短臂上具次缢痕。

Chromosome has the secondary constric-tion ( sc ) in its short arm .

染色体短臂近着丝粒区观察到次缢痕。

The secondary constriction has been observed on the centromere region of the chromosome No.

一例带有两条9号染色体次缢痕丢失的患者及其家系的细胞遗传学研究

Studies on Cytogenetics of A Patient with Two Chromosomes 9 Secondary Constriction Deletion and Pedigree

三种在臂比值和次缢痕的有无、位置方面存在差异。

However , the SAT-chromosome and the secondary constriction were not found on any chromosome present .

但是染色体形态，如臂比值和次缢痕的位置和数目存在一定差异。

They differ from each other both in chromosome shapes and the positions of secondary constrictions .

在蚕豆异常生长的植株的核型中，由M染色体次缢痕断裂所产生的随体断片高约36.63%；

In the karyotypes of abnormally growing plants of Vicia faba , frequency of satellite fragments ( SPs ) produced by breakage of secondary constriction ( SC ) of M chromosomes is about 36.63 % ;

9和16号染色体长臂次缢痕增长的异态类型引起的早期生殖障碍发生率较高，均在50%以上。

The incidence rates of early reproduction inability were more than 50 % in people with long arm constitutive increasing of chromosome 1,9 and 16 . Results : There was corelation between chromosome heteromorphism and reproduction inability .