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染色体与核DNA数量变化动画
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染色体与核 DNA 数量变化视觉化

人教版高中生物 · 细胞分裂过程动态曲线

核DNA: - 染色体: -
① DNA 复制

发生在间期，表现为 DNA 曲线的斜线上升，此时染色体数量不变。

② 着丝粒分裂

发生在有丝分裂后期或减Ⅱ后期，染色体数量瞬间加倍。

③ 受精作用

精子与卵细胞结合，使染色体和 DNA 数量恢复至亲代水平。

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BioVlab 高中生物虚拟实验室 | 制作：佚名©版权所有，侵权必究

杨学东名师工作室

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