假设水稻抗病为显性高秆为显性现有纯合的抗病高秆水稻和感病矮秆水稻为了在较短的年限内培育出稳定遗传的抗病矮秆水稻可采取以下步骤 1 Sketch Coloring Page

假设水稻抗病为显性高秆为显性现有纯合的抗病高秆水稻和感病矮秆水稻为了在较短的年限内培育出稳定遗传的抗病矮秆水稻可采取以下步骤 1 Template

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tomski假设水稻抗病为显性高秆为显性现有纯合的抗病高秆水稻和感病矮秆水稻为了在较短的年限内培育出稳定遗传的抗病矮秆水稻可采取以下步骤 1 coloring

水稻的高秆为显性抗稻瘟病为显性这两对基因位于不同对的染色体上将一株高秆抗病的植株甲与另一株高秆易感病的植株乙杂交结果如右图所示 sketch template

水稻的高秆为显性抗稻瘟病为显性这两对基因位于不同对的染色体上将一株高秆抗病的植株甲与另一株高秆易感病的植株乙杂交结果如图所示 sketch template

水稻的高秆为显性抗稻瘟病为显性这两对等位基因位于不同对的同源染色体上．将一株高秆抗病的植株甲与另一株高秆易感病的植株乙杂交结果如 sketch template

水稻的高秆D对矮秆d为显性抗稻瘟病R对易感稻瘟病r为显性这两对等位基因位于不同对的同源染色体上将一株高秆抗病的植株甲 sketch template

sketch template

题目水稻是重要的粮食作物之一已知高秆是显性抗病是显性控制上述两对性状的基因分别位于两对同源染色体上 现有纯合的水稻品种甲请分析 sketch template

假设水稻抗病为显性高秆为显性现有纯合的抗病高秆水稻和易感病矮秆水稻为了在较短的年限内培育出稳定遗传的抗病矮秆水稻可采取以下步骤 1 sketch template

已知水稻高秆为显性抗病为显性这两对基因在非同源染色体上现将一株表现型为高秆抗病的植株的花粉授给另一株表现型相同的植株所得后代表现型是 sketch template

水稻的高秆为显性抗稻瘟病为显性这两对基因两对基因遵循自由组合定律将一株高秆抗病的植株甲与另一株高秆易感病的植株乙杂交结果如图所 sketch template

题目水稻高秆T对矮秆t为显性抗病R对感病r为显性这两对基因独立遗传现将一株表现型为高秆抗病的植株的花粉授给另一株表现 sketch template

水稻的有芒为显性抗病为显性这两对基因自由组合现有纯合有芒易感病株与纯合无芒抗病株杂交得到F1代再将此F1与无芒的杂合抗病株杂交子代 sketch template

假设水稻抗病为显性高秆为显性现有纯合的抗病高秆水稻和易感病矮秆水稻为了在较短的年限内培育出稳定遗传的抗病矮秆水稻可采取以下步骤 1 sketch template

玉米的性状中黄对白非甜对甜为显性两种性状独立遗传．让纯合的黄色非甜玉米与白色甜玉米杂交得到F1再让F1自交得到F2若在F2中有黄色 sketch template

小麦中高秆对矮秆为显性T T抗病对不抗病为显性R R以高秆抗病和矮秆不抗病小麦为亲本进行杂交得到的Fl进行自交所得F2的表现型及 sketch template

题目已知水稻的抗病为显性有芒为显性现有抗病有芒和感病无芒两个品种要想选育出抗病无芒的新品种生产中一般采用的育种方法为A 杂交育种 sketch template

已知二倍体水稻抗病对无芒b为显性．两对基因自由组合体细胞染色体数为24条现用单倍体育种方法选育抗病有芒水稻新品种．下列叙述错误的是 sketch template

假如水稻的高秆为显性抗稻瘟病为显性现有一高秆抗稻瘟病的亲本水稻和矮秆易染病的亲本水稻杂交产生的F1再进行测交结果如下图所示据图可知 sketch template

二化螟以水稻茎秆纤维为食，褐飞虱主要刺吸水稻茎叶汁 高途 sketch template

假如水稻高秆为显性抗稻瘟病为显性两对性状独立遗传．用一个纯合易感病的矮秆品种与一个纯合抗病高秆品种杂交F2代中出现既抗病又抗倒伏类型的 sketch template

假设水稻抗病为显性高秆为显性现有纯合的抗病高秆水稻和感病矮秆水稻为了在较短的年限内培育出稳定遗传的抗病矮秆水稻可采取以下步骤 1 sketch template

题目已知玉米高秆为显性抗病为显性控制上述性状的基因位于两对同源染色体上现用两个纯种的玉米品种甲和乙ddrr杂交得F1再用F1与 sketch template

假如水稻高杆为显性抗稻瘟病为显性两对性状独立遗传现用一个纯合易感染稻瘟病的矮杆品种与一个纯合抗稻瘟病的高秆品种杂交F2中出现既抗倒伏又 sketch template

小麦的高秆为显性有芒为显性．将两种小麦杂交后代中出现高秆有芒高秆无芒矮秆有芒矮秆无芒四种表现型且其比例依次为3131则亲本 sketch template

�鱼草正常花冠对不整齐花冠为显性高株对矮株为显性红花对白花为不完全显性杂合状态是粉红花如果纯合的红花高株正常花冠植株与纯合的白花 sketch template

阅读下面的材料回答有关问题材料一�学工作者将一种高产不抗倒伏的小麦与另一种低产抗倒伏的小麦进行杂交后代中出现了下图中四种类型选择高产 sketch template

20．水稻是自花传粉植物水稻的高茎对矮茎是显性判断高茎是否是纯合体最经济最合理的方法是 A．测交 B．测交和自交 C．自交 D．无需测交 sketch template

下列叙述正确的是A．杂种后代中只显现出显性性状的现象叫做性状分离B．隐性性状是指生物体不能表现出来的性状C．测交是指F1与隐性纯合子杂交D sketch template

水稻是�国重要的粮食作物在�国已有约7000年的栽培历史 1从光合作用固定CO2的途径来看水稻属于植物CO2被固定后由参与 sketch template

玉米的高秆对矮秆为显性抗病对易感病为显性这两对性状独立遗传 F1性状 高秆 矮秆 抗病 易感病 ——青夏教育精英家教�—— sketch template

12．番茄果实的红色对黄色为显性两室对多室为显性植株高对矮为显性三对相对性状分别受三对非同源染色体上的非等位基因控制育种者用纯合红色两 sketch template

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已知玉米高秆为显性抗病为显性控制上述性状的基因位于两对同源染色体上现用两个纯种的玉米品种甲杂交得F1再用Fl与玉米丙杂交图1结果 sketch template

玉米是重要的粮食作物之一．已知玉米的高秆易倒伏为显性抗病为显性控制上述两对性状的基因分别位于两对同源染色体上．为获得纯合矮秆抗病玉米植株 sketch template

题目小麦植株高茎为显性抗病为显性两对基因独立遗传研究人�以基因型为AaBb的高茎抗病小麦幼苗为材料通过下图三种途径获得矮茎抗病新 sketch template

下列技术中不能获得抗锈高产小麦新品种的是 A．诱变育种 B．细胞融合 C．花粉离体培养 D．转基因——青夏教育精英家教�—— sketch template

下列曲线能正确表示杂合子Aa连续自交若干代子代中显性纯合子所占比例的是——青夏教育精英家教�—— sketch template

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