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【简答题】
如下为包含不同染色体的细胞图及不同育种技术的流程图,据图回答问题: (1) 若图中所示 A 、 B 、 C 、 D 细胞均为植物的体细胞,则这四个细胞中一定取自单倍体的是 ________ ,可能取自三倍体的是 ____ ____ 。 (2) 育种技术流程图中,过程 I 代表 ________ 。过程 II 指的是 ________ 。 (3) 单倍体育种的过程指的是 ________ ,其中 ________ 过程需要使用秋水仙素。 ( 填写图中罗马数字 ) (4) 育种流程图中,获得 AAbb 最快速的方法的优点是 _________________________________________________________________ 。
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