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

试卷相关题目

• 1一个患抗维生素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

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• 2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

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• 3一种观赏植物，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

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• 4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

  A.3∶2∶1

  B.1∶2∶1

  C.3∶5∶1

  D.4∶4∶1

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• 5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

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• 6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
• 7在噬菌体侵染细菌的实验中，如果细菌体内的DNA和蛋白质分别含有³¹P和³²S，噬菌体中的DNA和蛋白质分别含有³²P和³⁵S，噬菌体在细菌体内复制了三次，那么从细菌内释放出的子代噬菌体中含有³²P的噬菌体和含有³⁵S的噬菌体分别占子代噬菌体总数的

  A.3／4和0

  B.1／4和0

  C.3／4和1

  D.1／4和1

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