Each trait below has a classic textbook mode of inheritance: dimples, freckles, a widow's peak and an unattached earlobe are usually described as dominant; tongue rolling and mid-digit hair vary; a cleft chin is often dominant. For every trait we compare the parents' checkboxes and return a simple likelihood label. Real genetics is far more complex — many of these traits are polygenic — so we deliberately keep the language friendly and non-clinical.
下表每个特征都有教科书式的遗传模式：酒窝、雀斑、美人尖、分离耳垂通常被描述为显性；卷舌与中指毛因人而异；下巴沟常为显性。我们对每个特征比较父母的勾选情况并给出简单的可能性标签。真实遗传远为复杂——许多特征属于多基因遗传——所以我们刻意使用轻松、非临床的语言。
