初级缢痕 primary constriction

互联网2013-11-14

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　　指染色体上的纺锤丝附着点，即含有着丝粒的缢痕。亦称主缢痕。在功能上是为局限型着丝粒。由于初级缢痕的位置不同染色体常有一定，所以这也可作为染色体组型分析的重要指标。

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