江西省万载县高中生物专题3胚胎工程3.3胚胎工程的应用及前景(练习课)教案新人教版选修3.doc

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1、 1 -3.3 胚胎工程的应用及前景(练习课)教学目标 复习巩固所学知识,培养学生运用知识的能力重点 查缺补漏,培养学生运用知识的能力难点 查缺补漏,培养学生运用知识的能力教学过程 时间 设计意图 个人备课一、 知识点总结1、胚胎分割2、胚胎干细胞(简称 ES 或 EK 细胞)二、习题讲解世纪金榜课时检测区 P57三、习题巩固【例】印度沙漠猫是一种珍稀猫科动物,通过胚胎工程技术,可以让家猫代孕而繁育,主要步骤如图所示。下列相关叙述正确的是 ( )A.步骤甲、乙分别是指精子获能、胚胎分割B.诱导超数排卵所注射的激素只能作用于特定细胞C.受精卵发育成早期胚胎所需营养主要来源于培养液D.步骤甲使用

2、的培养液和早期胚胎培养液成分基本相同【解题指南】解答本题需关注以下两点:(1)题干关键词:印度沙漠猫是一种珍稀猫科动物、胚胎工程技术、让家猫代孕而繁育。(2)解题思路:根据图中超数排卵和收集精液步骤甲是体外受精早期胚胎培养步骤乙是将早期胚胎移植到同期发情处理的家猫子宫中。【解析】选 B。本题主要考查体外受精、早期胚胎培养与胚胎移植技术。步骤甲是指受精作用,步骤乙是指胚胎移植, 3402总结知识点,加深对本课的理解讲解练习,培养学生运用知识的能力通过练习巩固,进一步加深对本课的掌握- 2 -A 项错误。诱导超数排卵所注射的激素是促性腺激素,只能作用于性腺细胞,B 项正确。受精卵发育成早期胚胎所需营养主要来自受精卵,C 项错误。受精过程使用的培养液是获能溶液或专用的受精溶液,与早期胚胎培养液不同,D 项错误。教学反思

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