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【镜头再现】请看《奇妙的克隆》的教学片段(以下简称“案例一”)。一、填表后分析克隆过程小黑板上给出表样,让学生看课文填表。研究讨论后,由一名学生在黑板上写出(仿宋体是学生填写的内容)。师:根据表中内容,概括克隆的过程。生1:第一步,取出胚胎细胞的核。师:好!“取出”能说明试验时的动作。师:取出谁的胚胎细胞核?生2:要克隆动物的胚胎细胞核。师:克隆“羊”用的是乳腺细胞,怎样表述这一步才准确?(众生各抒己见)
【Reproduction】 Please see the “fantastic clone” teaching fragment (hereinafter referred to as “case one”). First, fill in the table after the analysis of the cloning process Small blackboard gives a sample, so that students see the text fill in the form. After the study was discussed, a student wrote on the blackboard (imitation of Times New Roman is filled out by students). Teacher: According to the table summarizes the process of cloning. Health 1: The first step, remove the nucleus of embryonic cells. Teacher: Good! “Remove ” can explain the test action. Teacher: Whose embryo nucleus is removed? Student 2: The embryo nucleus of the animal to be cloned. Teacher: Cloning “sheep ” is a breast cell, how to express this step is accurate? (All sentient beings express their opinions)