词典释义：
双语例句
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The host biotypes have their genetic bases, including the mutation or change in enzymes and chromosomes, sexual reproduction, assortive mating and genetic differentiation of population.
并且具有一定的遗传基础，主要表现在蚜虫体内酶系的变化、染色体变异、有性繁殖中同型交配行为及种群的遗传分化上。