干体 stem body，pushing body

互联网2013-11-14

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　　K． Bě lar（ 1929）将有丝分裂后期的纺锤体的中间区（ interzonal region），即子染色体群之间的部分称为干体。他曾提倡一种干体学说，即由于干体的伸长，可使染色体向两极移动。但现在已弄清染色体向两极的移动是由于着丝粒丝牵引所致。

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