phenotypic assortative mating

例句：

1. 1.In the study of genetics, phenotype-assortative mating is a key concept.
   在遗传学研究中，表型择偶是一个关键概念。
2. 2. The researchers found that phenotypic assortative mating was responsible for the decline in population size.
   研究人员发现，表型择偶是导致人口数量减少的原因。
3. 3.The theory of phenotypic assortative mating suggests that individuals with similar traits are more likely to mate with each other.
   表型择偶理论表明，具有相似特征的个体更有可能相互交配。