Instead of looking for homozygous variants where each parent carried an allele, the researchers were looking for heterozygous variants that were also not present in the parents.
研究人员寻找不存在与父母中的杂合变异体，而不是寻找每位亲本携带一个等位基因的纯合变异体。
In genetics, refers to an allele that is expressed in both the heterozygous and homozygous condition.
指等位基因在杂合状态和纯合状态都有表达的现象。
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