So identical twins share 100 percent of their environment and 100 percent of their genes, whereas non-identical twins share 100 percent of their environment, but just like any brother and sister, share only 50 percent of their genes.
同卵双胞胎有100%相同的环境 以及100%相同的基因， 然而，异卵双胞胎 有100％相同的环境， 但像任何兄弟姐妹一样， 只有一半相同的基因。