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.
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.
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