以染色体组为单位的增、减.是染色体数目变异的一种.包括单倍体和多倍体两种类型的整倍性变化，多倍体类型中，一般又包括同源多倍体和异源多倍体.各种整倍性变异，在细胞学和遗传学均产生一定的效应.GOOGLE英文翻译:Genome as a unit with the increasing reduction. Is a variation of chromosome number. Including two types of haploid and polyploid changes the whole times, polyploid types, in general, and also includes autopolyploid allopolyploid. a variety of whole-fold variation, both in cytology and genetics have some effect.