已知一批基因型为AA和Aa的豌豆种子，其数目之比为1∶2，将这批种子种下，自然状态下（假设结实率相同）其子一代中基因型为AA、Aa、aa的种子数之比为

试卷相关题目

• 1下列各项有可能存在等位基因的是

  A.四分体

  B.一个双链DNA分子

  C.染色体组

  D.非同源染色体

  开始考试点击查看答案
• 2在豚鼠中，黑色（C）对白色（c）、毛皮粗糙（R）对毛皮光滑（r）是显性。能验证基因的自由组合定律的最佳杂交组合是

  A.黑光×白光→18黑光∶16白光

  B.黑光×白粗→25黑粗

  C.黑粗×白粗→15黑粗∶7黑光∶16白粗∶3白光

  D.黑粗×白光→10黑粗∶9黑光∶8白粗∶11白光

  开始考试点击查看答案
• 3细胞的有丝分裂和减数分裂都可能产生可遗传的变异，其中仅发生在减数分裂过程的变异是

  A.染色体不分离或不能移向两极，导致染色体数目变异

  B.非同源染色体自由组合，导致基因重组

  C.染色体复制时受诱变因素影响，导致基因突变

  D.非同源染色体某片段移接，导致染色体结构变异

  开始考试点击查看答案
• 4某二倍体动物的某细胞内含有10条染色体、10个DNA分子，且细胞膜开始缢缩，则该细胞

  A.处于有丝分裂中期

  B.正在发生基因自由组合

  C.将形成配子

  D.正在发生DNA复制

  开始考试点击查看答案
• 5下列关于细胞周期的叙述，正确的是

  A.成熟的生殖细胞产生后立即进入下一个细胞周期

  B.机体内所有的体细胞都处于细胞周期中

  C.抑制DNA的合成，细胞将停留在分裂期

  D.细胞分裂间期为细胞分裂期提供物质基础

  开始考试点击查看答案
• 6一种观赏植物，纯合的蓝色品种与纯合的红色品种杂交，F1为蓝色，F1自交，F2为9蓝∶6紫∶1红。若将F2中的紫色植株用红色植株授粉，则后代表现型及其比例是

  A.2红∶1蓝

  B.2紫∶1红

  C.2红∶1紫

  D.3紫∶1蓝

  开始考试点击查看答案
• 7人的i、I^A、I^B基因可以控制血型。在一般情况下，基因型ii为O型血I^A I^A或IA i为A型血，I^BI^B或I^Bi为B型血，I^AI^B为AB型血。以下有关叙述正确的是

  A.子女之一为A型血时，双亲至少有一方一定是A型血

  B.双亲之一为AB型血时，能生出O型血的孩子

  C.子女之一为B型血时，双亲之一有可能为A型血

  D.双亲之一为O型血时，能生出AB型血的孩子

  开始考试点击查看答案
• 8一个患抗维生素D佝偻病的男子与一正常女子结婚，为预防生下患病的孩子进行了遗传咨询，你认为有道理的指导应该是

  A.不要生育

  B.妊娠期多吃含钙食品

  C.只生男孩

  D.只生女孩

  开始考试点击查看答案
• 9艾弗里等人的肺炎双球菌转化实验和赫尔希与蔡斯的噬菌体侵染细菌试验都证明了DNA是遗传物质。这两个实验在设计思路上的共同点是

  A.重组DNA片段，研究其表型效应

  B.诱发DNA突变，研究其表型效应

  C.设法把DNA与蛋白质分开，研究各自的效应

  D.应用同位素示踪技术，研究DNA在亲代与子代之间的传递

  开始考试点击查看答案
• 10科学家从烟草花叶病毒(TMV)中分离出a、b两个不同品系，它们感染植物产生的病斑形态不同。下列4组实验(见下表)中，不可能出现的结果是<table style="MARGIN: auto 6.75pt; BORDER-COLLAPSE: collapse; mso-table-layout-alt: fixed; mso-table-lspace: 9.0pt; mso-table-rspace: 9.0pt; mso-table-anchor-vertical: paragraph; mso-table-anchor-horizontal: margin; mso-table-left: right; mso-table-top: 85.15pt; mso-padding-alt: 0cm 0cm 0cm 0cm" border="0" cellspacing="0" cellpadding="0" align="right" _dj="MsoNormalTable"><tbody><tr style="HEIGHT: 18.9pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes"><td style="BORDER-BOTTOM: #000000; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 31.1pt; PADDING-RIGHT: 0cm; HEIGHT: 18.9pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" valign="top" width="41">实验</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 297.35pt; PADDING-RIGHT: 0cm; HEIGHT: 18.9pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" rowspan="2" width="396">实验过程</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 117.85pt; PADDING-RIGHT: 0cm; HEIGHT: 18.9pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="157" colspan="2">实验结果</td></tr><tr style="HEIGHT: 25.75pt; mso-yfti-irow: 1"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 31.1pt; PADDING-RIGHT: 0cm; HEIGHT: 25.75pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" valign="top" width="41">编号</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 43.75pt; PADDING-RIGHT: 0cm; HEIGHT: 25.75pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="58">病斑类型</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 74.1pt; PADDING-RIGHT: 0cm; HEIGHT: 25.75pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="99">病斑中分离出的病毒类型</td></tr><tr style="HEIGHT: 10.05pt; mso-yfti-irow: 2"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 31.1pt; PADDING-RIGHT: 0cm; HEIGHT: 10.05pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="41">①</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 297.35pt; PADDING-RIGHT: 0cm; HEIGHT: 10.05pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="396">a型TMV 感染植物</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 43.75pt; PADDING-RIGHT: 0cm; HEIGHT: 10.05pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="58">a型</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 74.1pt; PADDING-RIGHT: 0cm; HEIGHT: 10.05pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="99">a型</td></tr><tr style="HEIGHT: 14.9pt; mso-yfti-irow: 3"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 31.1pt; PADDING-RIGHT: 0cm; HEIGHT: 14.9pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="41">②</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 297.35pt; PADDING-RIGHT: 0cm; HEIGHT: 14.9pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="396">b型TMV 感染植物</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 43.75pt; PADDING-RIGHT: 0cm; HEIGHT: 14.9pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="58">b型</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 74.1pt; PADDING-RIGHT: 0cm; HEIGHT: 14.9pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="99">b型</td></tr><tr style="HEIGHT: 12.6pt; mso-yfti-irow: 4"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 31.1pt; PADDING-RIGHT: 0cm; HEIGHT: 12.6pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="41">③</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 297.35pt; PADDING-RIGHT: 0cm; HEIGHT: 12.6pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="396">组合病毒(a型TMV的蛋白质+b型TMV的RNA) 感染植物</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 43.75pt; PADDING-RIGHT: 0cm; HEIGHT: 12.6pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="58">b型</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 74.1pt; PADDING-RIGHT: 0cm; HEIGHT: 12.6pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="99">a型</td></tr><tr style="HEIGHT: 14pt; mso-yfti-irow: 5; mso-yfti-lastrow: yes"><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 31.1pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="41">④</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 297.35pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="396">组合病毒(b型TMV的蛋白质+a型TMV的RNA) 感染植物</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 43.75pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="58">a型</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 74.1pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="99">a型</td></tr></tbody></table>

  A.实验①

  B.实验②

  C.实验③

  D.实验④

  开始考试点击查看答案