短语词组短語x -chromosome linked 染色躰連鎖nucleolus X -chromosome 核仁X染色躰X -chromosome inactivation 染色躰失活;染色躰失活過程;染色躰失活過程inactive x -chromosome 失活x染色躰heteropycnotic X -chromosome 異固縮性染色躰 返回 X-chromosome