一个男性将X染色体上的某一突变基因传给他外孙女的概率是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24532' and id < 2108148 and id<>'2108148' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24532' and id > 2108148 and id<>'2108148' order by id asc limit 5