看图读一读，把A、B、C、D填入相应的横线上。

A. It is winter. It is cold. We can make a snowman(雪人).

B. It is spring. Itis warm. We can ride bicycle in the park.

C. It is autumn. It is cool and windy. We can fly kites in the park.

D. It is summer. It is hot. We can swim in the sea.

表现正常的双亲，生了一个白化病色盲的男孩，这对夫妇的基因型是（   ）