题目

 The minute I opened the window, _______. A. in a sparrow flew                                                B. flew in a sparrow      C. did a sparrow fly in                                        D. in flew a sparrow 答案：D右图所示的红绿色盲患者家系中，女性患者Ⅲ-9的性染色体只有一条X染色体，其他成员性染色体组成正常。Ⅲ-9的红绿色盲致病基因来自于（    ）A．Ⅰ-1B．Ⅰ-2C．Ⅰ-3D．Ⅰ-4