It generally occurs when there are two or more allelic forms of a major gene in a population 当种群中的主要基因具有两个或多个等位基因类型时，不连续变异可以发生。
2.
Discontinuous variation ( qualitative variation ; qualitative inheritance ) a form of variation in which a character has two or more distinct forms in a population 不连续变异：在种群中存在两个或多个完全不同性状的一类变异方式。
