致死突变 lethal mutation

互联网2013-11-14

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致死突变 lethal mutation 导致个体在生长过程中发生死亡的突变称为致死突变。显性致死突变（dominant lethal）会使杂合个体死亡，隐性致死突变（recessive lethal）在纯合体时才使这一个体死亡。单倍体生物，例如细菌，只有以条件致死突变（conditional lethal指突变体的生死系由生长条件所决定，例如高温致死突变，无义突变）一类的突变形式才能检查出致死突变。

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