Objecties . to determine the allelic distribution of the exon 12 polymorphism within a sample of families with fis 目的：决定在具有家族性特发性脊柱侧凸（ fis ）的家族样本中外显子12多态现象的等位基因的分配。
Abstract : the risk of cluster headache ( ch ) is associated with the g - allele of the g1246a polymorphism in the hypocretin receptor 2 ( hcrtr2 ) gene 摘要：丛集性头痛的危险与食欲素受体2的g1246a等位基因多形性有关。
Double recessive an organism containing both recessive alleles of a particular gene and thus expressing the recessive form of the gene in its phenotype 双隐性：一个生物体包含一对隐性等位基因，则表现为隐性性状。
Note : m is the allele of mother ; f is the putative allele of father ; + is with the allele ; - is without the allele 注: m为来自于母亲的等位基因; f为父亲应具有的等位基因; +表示具有该等位基因; -表示不具有该等位基因。
