基因在确定人们的精神能力(mental abili-ties)方面所起的强大作用令人惊奇。一项对孪生老年人的研究已发现,80岁或更大年龄后,自然增高是自始至终的。这些科学家曾普遍认为,人一生的经历将逐渐冲洗掉基因在确定精神能力中所起的任何作用。瑞典研究人员对240对孪生儿(110对同卵双生和130对同性别的孪生儿)进行检查,其年龄均在80岁以上,且精神活跃。对每一孪生儿都进行一组检验,测定他们口述和对空间感 The powerful role genes play in determining mental abili-ties is surprising. A study of twin seniors has found that the natural increase after the age of 80 or above is from beginning to end. It is generally accepted by these scientists that a person’s life experiences will gradually flush out any role the gene plays in determining mental capacity. Swedish researchers examined 240 pairs of twins (110 pairs of identical twins and 130 pairs of same-sex twins) who were over 80 years old and active. A test was performed on each twin, measuring their oral and spatial perception