着丝点是染色体的主缢痕，在这个地方姐妹染色单体连在一起。
Centromere is the primary constriction on the chromosome, a region at which the sister chromatids are held together.
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.
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.
染色体的主缢痕，使姐妹染色单体连在一起，在其两侧各有一个由蛋白构成的动粒。
Centromere --- The primary constriction on the chromosome, a region at which the sister chromatids are held together and at which the kinetochore is formed.
发现叶绿体是在长轴的中部或近中部产生缢痕、逐渐紧缩并断裂为两个子叶绿体的。
Theprocess begins with the fracture around the middle part of the longitudinal axile of the chloroplast. Then thechloroplast gradually contracts until it breaks into two daughter chloroplasts.
在甘肃白猪的两大地方类群中，临夏类群第8对染色体上次缢痕出现的频率高于武威类群。
In two native groups of Gansu white pig, the frequencies of secondary constrictions in 8th chromosomes in Linxia group were higher than in Wuwei group.
本文报道了一例两条9号染色体次缢痕缺失的女性病例，临床表现为严重智力低下和语言障碍。
This report describes a female ease who is complete deletion of secondary constriction on two chromosomes 9. The major clinical phenomenon is severe mental retardation.
染色体多态性17例，占异常核型的9.83%，主要包括Y染色体多态性、次缢痕和随体的变异。
There were 17 cases of chromosome polymorphism, accounting for 9.83% of all abnormal karyotypes. It contains Y chromosome, secondary constriction, and variation of satellites.
推测副缢痕附近异染色质的DNA重复序列可能是在进化过程中通过染色单体不均等交换而逐渐形成。
It is presumed that the repeated DNA sequences of the heterochromatin near the secondary constriction might be formed gradually in the process of evolution through unequal SCEs.
从爪鲵核型的高度不对称性和二型性以及次缢痕特征，推测该种爪鲵是小鲵科中较原始而又特化的种类之一。
The karyotype is asymmetrical and bimorphous, suggesting that the species is one of the primitive forms in the family Hynobiidae.
从爪鲵核型的高度不对称性和二型性以及次缢痕特征，推测该种爪鲵是小鲵科中较原始而又特化的种类之一。
The karyotype is asymmetrical and bimorphous, suggesting that the species is one of the primitive forms in the family Hynobiidae.
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