8相似與差異课件.ppt

每位孩子来到这个缤纷的世界上，人们除了送上衷心的祝福外，还有趣的评判孩子的长相，究竟像爸爸还是像妈妈。;8.相似与差异;;;;什么是遗传？;遗传; 遗传的现象;动物间的遗传现象 ;Ａ;;植物之间的遗传现象;我们能用哪些办法找出自己与家庭 成员的相似特征 ;世界上有没有长得一模一样的人？;活动一：仔细观察找相似; ? 同代人之间特征调查;;将自己的特征与同学的进行比较;有没有和自己各个特征完全一样的同学？;小组成员间相互观察人体的下列性状：;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;无耳垂 有耳垂;食指;1、分组调查（先小组再大组） 2、全班统计（大组汇总得到全班数据） 3、自己的特征与同学比较，交流结果并填写在书中34页表格1，在坐标纸上用柱状图表示。 4、根据统计结果讨论发现规律？有没有和自己四项特征完全相同的同学？;;如何将自己大组同学的特征和自己的进行比较呢？;;活动三：寻找它们的差异;寻找动物或植物各自种类间的相似与差异;;仔细看看它们是一样的吗？;玫瑰冠 与 单冠;相似与差异都是什么原因造成的？;什么是变异？; 变异的现象;变异;;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;存在于不同物种之间;存在于一家三代之中;存在于同个物种之内（马）;存在于同个物种之内（油菜）;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Create