以下为句子列表：
英文: An allele that, in a heterozygote, prevents the expression of another (recessive) allele at the same locus.
中文: 杂合体生物与显性纯合体生物具有相同的表现型。
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英文: Doe to its exceeding sterility, the mutation was maintained by heterozygotes, and it was also inherited stably after five generations of self-pollination.
中文: 由于其高度不育，突变性状采用杂合体保存，经5代连续自交，均表现稳定遗传特性。
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英文: On selfing or crossing heterozygotes some double recessives may appear, giving viable offspring.
中文: 在自交或杂交产生的杂合子中双隐性性状可以表现出来并产生可育后代。
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英文: Selfing heterozygotes halves the heterozygosity, and thus outbreeding maintains heterozygosity and produces a more adaptable population.
中文: 自交杂合子有一半杂合性，因此远系繁殖可以产生适应能量更强的种群。
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英文: The segregation ratio of wild type plants to mutant plants in the population degenerated from heterozygotes was 3:1, indicating that the mutant is controlled by a single recessive gene, and designated tentatively as TOR.
中文: 同时，杂合株系呈典型的3:1分离比例，表明该突变性状由单隐性基因控制，并将该突变体暂时命名为TOR。
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