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lethal allele

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lethal allele
lethal allele (lethal gene) A mutant form of a gene that eventually results in the death of an organism if expressed in the phenotype. Most lethal genes are recessive; for example, sickle-cell anaemia (see polymorphism ) results from a recessive lethal gene that causes the production of abnormal ...
January 1, 2004; A Dictionary of Biology

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