园林植物遗传育种-在线作业_A一单项选择题1.遗传物质DNA主要存在于____。高尔基体染色体质体核糖体ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:染色体KnowledgePoint:2.减数分裂中同源染色体联会发生在____时期。前期后期中期末期ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:前期KnowledgePoint:3.____是主要遗传物质。脱氧核糖核酸蛋白质核糖核酸酶ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:脱氧核糖核酸KnowledgePoint:4.有丝分裂中,纺锤丝附着于染色体的____部位。随体短臂长臂着丝点ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:着丝点KnowledgePoint:5.一个花粉母细胞经过减数分裂,可形成____个花粉粒。1个4个3个2个ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:4个KnowledgePoint:6.遗传信息最终以____形式表达。糖RNA蛋白质脂类ExamScore:5.0ExamineeScore:0.0ExamineeAnswer:RNAKnowledgePoint:7.番茄的红果(Y)对黄果(y)为显性,二室(M)对多室(m)为显性,基因型YyMm能产生_____种配子。5种4种2种3种ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:4种KnowledgePoint:8._____类型的变异导致配子半不育。染色体倒位染色体重复基因突变染色体缺失ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:染色体倒位KnowledgePoint:9.由细胞质控制的遗传性状主要与____有关。母本父母本父本子代ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:母本KnowledgePoint:10.数量性状的变异呈现出____性。规则性不连续性连续性没规则性ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:连续性KnowledgePoint:11.比正常二倍体物种少一条染色体的物种叫____。单体缺体双体三体ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:单体KnowledgePoint:12.植物雄性不育系____。不能用于杂交可在杂交中作母本可作为回交中的父本可在杂交中作父本;ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:可在杂交中作母本KnowledgePoint:13.哈迪—魏伯格定律是指在无其它因素干扰下____始终保持不变。等位基因频率和基因型频率仅为等位基因频率仅为基因型频率表现型ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:等位基因频率和基因型频率KnowledgePoint:14.DNA复制发生于细胞周期的____时期。中期前期间期末期ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:间期KnowledgePoint:15.在有丝分裂或减数分裂的____时期最适合观察染色体。中期前期后期末期ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:中期KnowledgePoint:16.某种蔷薇染色体为7对(14条),则其胚乳中染色体为____条。21条7条28条14条ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:21条KnowledgePoint:17.某DNA分子上有这样一段信息,5`-ATCGAC-3`,则转录后的RNA分子的信息为____。3`-TAGCTG-5`5`-GUCGAU-3`3`-GUCGAU-5`3`-UAGCTG-5`ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:3`-UAGCTG-5`KnowledgePoint:18.罗卜块根长形(AA)与椭圆形(Aa)杂交,F1代基因型有____。1种3种4种2种ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:2种KnowledgePoint:19.某菊花品种出现了花粉半不育现象,经查是遗传物质发生了变化,可能是____情况。染色体重组染色体缺失染色体加倍染色体易位ExamScore:5.0ExamineeScore:0.0ExamineeAnswer:染色体缺失KnowledgePoint:20.细胞中____样的结构含有DNA。叶绿体内质网细胞膜溶酶体ExamScore:5.0ExamineeScore:5.0ExamineeAnswer:叶绿体KnowledgePoint: