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.
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.
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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