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【单选题】
肥厚型心肌病属于常染色体显性遗传病，以心肌细胞蛋白质合成的增加和细胞体积的增大为主要特征，受多个基因的影响。研究发现，基因型不同，临床表现不同。下表是3种致病基因、基因位置和临床表现。 下列相关叙述中，不正确的是（）A.
表中的三对基因遵守基因的自由组合定律
B.
发病较早且易猝死的个体含有的显性基因为A和C
C.
如果在个体发育过程敲除了C基因，对易猝死的肥厚型心肌病具有较好的治疗效果
D.
A、B和C三种基因本质上的区别是存在的位置不同
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