不同基因型决定相同表型的现象。参见等位基因异质性、临床异质性和基因座异质性。
Genetic lethal --- A mutant allele or genetically determined trait that leads to failure to reproduce, although not necessarily to death prior to reproduction.
等位基因排斥：免疫球蛋白的杂合子只表达一对等位基因中的一个的现象。
Allelic exclusion --- In immunogenetics, the observation that only one of the pair of parental alleles for each H chain and L chain of an immunoglobulin molecule is expressed within a single cell.
指等位基因在杂合状态和纯合状态都有表达的现象。
In genetics, refers to an allele that is expressed in both the heterozygous and homozygous condition.
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