题目

某对表现型正常的夫妇生出了一个红绿色盲的儿子和一个表现型正常的女儿，该女儿与一个表现型正常的男子结婚，生出一个幻绿色盲基因携带者的概率是 A. 1/2              15.1/4           C. 1/6           D. 1/8 答案：D— Does your mother like Yu Opera？— Yes，very much．And now it by all my family members．A.enjoysB.was enjoyedC.is enjoyedD.will enjoy