Recombinase-expressing mice are selected based on where and when they will activate conditional alleles, but some produce phenotypes in isolation that can complicate analysis of those alleles.

中文翻译：

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了解您的模型：表达重组酶的小鼠。

表达重组酶的小鼠是根据它们将在何时何地激活条件等位基因来选择的，但有些小鼠会单独产生表型，这会使这些等位基因的分析变得复杂。