双隐性：一个生物体包含一对隐性等位基因，则表现为隐性性状。

Double recessive an organism containing both recessive alleles of a particular gene and thus expressing the recessive form of the gene in its phenotype.

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蓝色眼睛的等位基因是隐性的。

The allele for blue eyes is recessive.

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被认为是无效等位基因的这些隐性突变都存在节间伸长缺陷。

All of these recessive mutations, which are considered to be null alleles, exhibit defects in internode elongation.

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