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.
这是这些杠杆臂的比值。
最长与最短染色体比值变化较大，为2.78～3.20； 平均臂比、着丝点指数、核型不对称系数、相对长度变化范围较小。
The ratio of the longest chromosome to the shortest range in 2.78~3.20. And index, index of karyotypic asymmetry and relatived length changed indistinctly.
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