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虽说每个人都是独一无二的，但我们都有两个眼睛一个嘴巴，基本的体态特征是一样的。看到别人多了一只手指我们都觉得惊奇不已，更何况下面这些“闻所未闻”的体态特征呢~ 是不是很好奇？那就跟小编一起来看看有那些奇特的体态特征吧~~ 1. No wisdom teeth 没有智齿 20% of people don’t have wisdom teeth, which is considered a normal variant. Their occurrence varies across different populations. For example, almost 100% of indigenous Mexicans don’t have wisdom teeth, while virtually all Tasmanian aborigines do. The difference is related to the PAX9 gene (and perhaps other genes). 20%的人没有智齿，人们认为这是正常的变异。不同的民族智齿出现的概率会有所不同。例如，几乎所有的土著墨西哥人都没有智齿，而几乎所有的塔斯马尼亚原住民都有智齿。这种差异与PAX9基因(或许还有其他基因)有关。 2. Blue eyes 蓝眼睛 It has been suggested that the blue eye color is due to a mutation in the HERC2 gene that leads to reduced melanin production in the iris. Only 8% of all people have blue eyes. 据说蓝眼睛的颜色是因为HERC2基因突变导致了虹膜内黑色素的减少而形成的。只有8%的世界人口有蓝色的眼睛。 3. Morton's Toe 摩顿趾 ; 摩顿氏趾 10% of people have Morton s toe: a foot structure where the first toe is shorter than the second. Interestingly, the Statue of Liberty also has feet of this kind. 10%的人有摩顿趾：一种脚的结构——第一个脚趾比第二个脚趾短。 有趣的是，自由女神像也有这样的脚。 4. Hair whorl 发涡 8.4% of people have counterclockwise hair whorls on their head. If you belong to the 10% of the population who are left-handed, though, your chances to not be like the majority are 45%. 8.4%的人头上有逆时针的发涡。如果你属于占人口10%的左撇子人群，那么你有逆时针发涡的几率是45%。 5. Sneezing 打喷嚏 25% of all people have an unusual reaction to sunlight: sneezing. This phenomenon even has its own name: photic sneeze reflex. 25%的人对阳光的反应不同寻常：打喷嚏。 这种现象甚至有专属的名字：光喷嚏反射。 6. Single palmar crease 断掌 The single transverse palmar crease, or the 'simian crease,' is found in 1.5% of the population (more often in males) and is a hereditary trait. 在1.5%的人群中发现了断掌（通常是男性），这是一种遗传性状。 小伙伴们还见过哪些奇特的体态特征呢？欢迎留言哦~ 学好英语，从听开始 听力课堂（ID：tingclass123） |
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