题目

                            Quick Work     Ted Robinson has been worried all the week. Last Tuesday he received a letter from the local police. In the letter he was asked to call at the station. Ted wanted to know why he was wanted by the police, but he went to the station yesterday and he is not worried any more.      At the station, he was told by a smiling policeman that his bicycle had been found. Five days ago, the policeman told him, the bicycle was picked up in a small village four hundred miles away. It is now being sent to his home by train.�如图是人的生殖细胞图，观察并回答问题：（1）甲图是 示意图，它是由男性的 产生的；（2）乙图是 示意图，它是由女性的 产生的．（3）甲乙两细胞结合后形成 ．