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secondary constriction (次缢痕)

名词解释题
2022-01-13 22:13
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正确答案

是染色体上的一个缢缩部位,由于此处部分的DNA松懈,形成核仁组织区,故此变细。它的数量、位置和大小是某些染色体的重要形态特征。每种生物染色体组中至少有一条或一对染色体上有次缢痕。


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secondary constriction (次缢痕)
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