杂合性：在一个基因位点上具有两个不同的等位基因。

When the two alleles are not identical, they are heterozygous.

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当两个等位基因不同时，称之为杂合性的。

When the two alleles are not identical, they are said to be heterozygous.

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当两个等位基因不同时，称之为杂合性的。

When the two alleles are not identical, they are said to be heterozygous.

youdao