Genetic lethal --- A mutant allele or genetically determined trait that leads to failure to reproduce, although not necessarily to death prior to reproduction.

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。

youdao

An individual that has starved to death is not one that can reproduce.

ECONOMIST: Abolishing ageing