江西省万载县高中生物专题3胚胎工程3.1体内受精和早期胚胎发育1教案新人教版选修3.doc

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1 -3.1 体内受精和早期胚胎发育 1教学目标 简述哺乳动物的精子和卵子的发生及受精过程重点 简述哺乳动物的精子和卵子的发生及受精过程难点 简述哺乳动物的精子和卵子的发生及受精过程教学过程 时间 设计意图 个人备课一、 检查预习检查世纪金榜自主预习【43】完成情况。二、导入新课直接导入三、推进新课(一)胚胎工程的概念1.操作对象:动物_或配子。2.处理技术:如体外受精、_、_、胚胎干细胞培养等技术。3.必需程序:经过处理后获得的胚胎,还需移植到_动物体内。(二)精子、卵子的发生1.精子的发生:(1)场所:_内。(2)时期:从_开始,直到_衰退。(3)过程(4)精子细胞变形特点2.卵子的发生:(1)场所:_。(2)时期:_(性别分化以后)和_。(3)过程(4)两次分裂的时间:第一次是在_完成的,第二次是在_的过程中完成的。3.精子和卵子发生的四个不同点3130检查预习情况,为讲解新课铺垫。导入新课,口述学习目标讲授分析,简述哺乳动物的精子和卵子的发生及受精过程- 2 -4.精子和卵子发生的三个相同点四、课堂训练 五、课堂小结六、 作业和预习预习体内受精和早期胚胎发育 2641当堂训练,检测知识运用总结本课学习内容,学生记忆相关知识点。布置下节课的预习任务教学反思

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