题目内容：

两个白化病个体交配，其F1代的表现型完全相同。当F1相互交配后所产生的9个是正常个体，7个是白化个体。 以下各项中，哪一组反映了这一遗传现象？    (    )

                 亲本                                    F2子代

A              AAbb×aaBB                      9A__B__        3aaB__           3A__bb          1aabb

B               Aabb×AAbb                     9A__B__        3aaBb             3Aabb             1aabb

C               AaBb×AaBb                      9A__B__        3aaBb             3Aabb             1aabb

D              AABB×aabb                      9A__B__        3aaB__           3Aabb             1aabb