Physical similarities between identical twins are genetic (基因的)，while their personalities，intelligence and other differences between them are an effect of their environment.
同卵双胞胎之间的身体相似性是遗传的，而他们之间的性格、智力和其他差异则是环境的影响。
[2021 江西省卷 阅读理解]
Environmental differences that a child experiences can sometimes affect the way the DNA behaves, making even identical twins into very different people.
一个孩子在出生前和第一年的经历有时会影响DNA的运作方式。
[2021 江西省卷 阅读理解]
