chromosomal variation

例句：

1. 1. Chromosomal variation is acommon cause of birth defects.
   染色体变异是出生缺陷的常见原因。
2. 2. The studyof chromosomal variationhas led to new insights intothe function of genes.
   对染色体变异的研究已经揭示了基因功能的新见解。
3. 3. Chromosomal variation can lead to differences in physicalcharacteristics between individuals.
   染色体变异可能导致个体之间的物理特征差异。