假减数 pseudo-reduction
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在第一次减数分裂时完成联会后的同源染色体,在粗线期的初期紧密地相接,在显微镜下分辨不出是两条染色体,因此,看起来染色体数目象变成半数,称此为假减数。这是一种暂时的现象。
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