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ID:47011144
大小:2.32 MB
页数:62页
时间:2019-12-03
《高中生物必修二遗传定律》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、P×F1F23:1矮高高×高矮787277二、一对相对性状的杂交实验为什么F1只有高茎?为什么F2中出现矮茎?Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.
2、高茎豌豆和矮茎豌豆杂交实验的分析图解Dd×DdDdDDDdDdddDD×dd高茎矮茎P配子DdF1Dd配子F2高茎高茎高茎矮茎1:2:1注意遗传图解书写的规范:Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyri
3、ght2004-2011AsposePtyLtd.四、对分离现象解释的验证DdddDd配子高茎矮茎高茎杂种子一代矮茎隐性纯合子×测交测交后代dDddd1:1测交实验证明了:Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.
4、Copyright2004-2011AsposePtyLtd.杂交AA×aaAa自交Aa×Aa1AA:2Aa:1aa测交Aa×aa1Aa:1aaEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-
5、2011AsposePtyLtd.一.两对相对性状的遗传试验Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.表现型的比例为9:3:3:1结合方式有16种9黄圆
6、:1YYRR2YyRR2YYRr4YyRr3黄皱:1YYrr2Yyrr3绿圆:1yyRR2yyRr1绿皱:1yyrr表现型4种基因型9种Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011
7、AsposePtyLtd.五、孟德尔成功的原因:1.选材:豌豆3.统计学方法4.科学设计试验程序2.先选择一对相对性状进行研究单因素多因素Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-201
8、1AsposePtyLtd.例1、求子代基因型(或表现型)种类已知基因型为AaBbCc×aaBbCC的两个体杂交,能产生_____种基因型的个体;能产生______种表现型的个体。例2、求子代个别基因型(或表现型)所占几率。已知基因型为AaBbCc×aaBbCC两个体杂交,求子代中基因型为AabbCC的个体所占的比例为__________;基因型为aBbCc的个体所占的比例为__________。1
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