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Internet迅速发展无所不在以及诱人的低价位，的确令众多厂商开始采用这种办法，但Internet天生的开放性特点令人无所适从，安全性又成了问题，公司的机密数据一旦在Internet传输，若没有安全性保障，其后果可想而知。villagetemplesCentralOfficeeveryday,carryouttheirduties.CorrespondencerelatingtoeducationbytheChiefofthefirstsectionmarkedmydraftstatement.Workedafterafewmonths,I'vebeenburiedintheofficialprogram,veryrigidmonotonyofclericalcareer,flavourless.1939of7Augustbetween,County,andSecretarytoIwithtoOfficemeeting,forGovernmentestablishedoneyearstoworkreported,fortimerush,priornotforfullprepared,hadtoinwaybyrankAnnMrdescribedoneyearstoaboutpeople,andfiscal,andbuilt,andtaught,andinsurancefiveaspectsimportantmatters,Iaccordinglydetailednarrativefinishingwritten,completedWujiangGovernmentestablishedoneyearstoofworkreport.TurnbackandforthmonthShanRoad,apartfromtheSecretary,Mrrankfootdiseaseimmobility,bamboocarinsteadofwalkingoutside,squarefoot(exceptformyselfand4guards),thewuxing,peace,SIan,Guangde,doorwayswing,ZhangZhutothedestination--wearingBu.Atdiweitotheimportanttownsoftroopsisdifficulttoaccess,wehavetochangeangles,Shanruggedtrails,Sunandrainontheway,hardshipexceptions,ifthepatrioticandpassionsofthewar,thanthesuccessfulcompletionoftasks.Anoldfrail,rank,long-distanceLawtonregrets,admirable!InNovember1939,IwasadmittedtotheFacultyoflaw,CollegeoflawandpoliticsinShanghai,butresignedfromthepostoffice,bidfarewelltothisshortandmemorablelife.(J)thesiazhenboatburiedJapanesemorningofOctober18,1937,siazhensicktoshunTangQiao-cutters,1fromNanxuntownjiaxingtoJapaneseboats,caughtdraggingbehind3smallboats,loadedwithmilitarygoods.Siazhentoolatetoescape,jumpedashoreJapancatchupwiththeboat,forcinghimtorowaboat.MeanwhilecaughtthemigrantsvillageZhangShun.Siazhenwassickforalongtime,必修二第一单元第一讲一、选择题1．孟德尔在豌豆杂交实验中，发现问题和验证假说所采用的实验方法依次是()A．自交、杂交和测交B．测交、自交和杂交C．杂交、自交和测交D．杂交、测交和自交答案C解析孟德尔发现两个遗传定律是利用豌豆进行实验时发现的，不管分离定律还是自由组合定律，二者的实验思路是相同的，实验时先让豌豆杂交获得F1，再让F1自交得F2，发现问题，最后用测交实验证明其假说。2．孟德尔做了如图所示的杂交实验，以下描述正确的是()A．所结豆荚细胞的基因型由植株A与植株B决定B．所结豆荚细胞的基因型与植株A相同，属于细胞质遗传C．豆荚中的每一粒种子的种皮是亲代的，胚是F1的D．豆荚中的种子萌发后的植株表现型都与植株A相同答案C解析胚、胚乳、果皮、种皮的基因型与表现型的判断难度较大，解答这类试题要具备三方面知识：一要明确被子植物生殖细胞的形成，二要明确被子植物的双受精过程，三要明确被子植物的个体发育过程。豆荚细胞是由母本的子房壁发育而来的，其基因型与母本相同；胚是由受精卵发育而来的，其基因型是由植株A与植株B共同决定的。3．(2013·肇庆一模)一匹家系来源不明的雄性黑马与若干匹雌性红马杂交，生出20匹红马和22匹黑马，你认为这两种亲本马的基因型是()A．黑马为显性纯合子，红马为隐性纯合子B．黑马为杂合子，红马为显性纯合子C．黑马为隐性纯合子，红马为显性纯合子D．黑马为杂合子，红马为隐性纯合子Internet迅速发展无所不在以及诱人的低价位，的确令众多厂商开始采用这种办法，但Internet天生的开放性特点令人无所适从，安全性又成了问题，公司的机密数据一旦在Internet传输，若没有安全性保障，其后果可想而知。villagetemplesCentralOfficeeveryday,carryouttheirduties.CorrespondencerelatingtoeducationbytheChiefofthefirstsectionmarkedmydraftstatement.Workedafterafewmonths,I'vebeenburiedintheofficialprogram,veryrigidmonotonyofclericalcareer,flavourless.1939of7Augustbetween,County,andSecretarytoIwithtoOfficemeeting,forGovernmentestablishedoneyearstoworkreported,fortimerush,priornotforfullprepared,hadtoinwaybyrankAnnMrdescribedoneyearstoaboutpeople,andfiscal,andbuilt,andtaught,andinsurancefiveaspectsimportantmatters,Iaccordinglydetailednarrativefinishingwritten,completedWujiangGovernmentestablishedoneyearstoofworkreport.TurnbackandforthmonthShanRoad,apartfromtheSecretary,Mrrankfootdiseaseimmobility,bamboocarinsteadofwalkingoutside,squarefoot(exceptformyselfand4guards),thewuxing,peace,SIan,Guangde,doorwayswing,ZhangZhutothedestination--wearingBu.Atdiweitotheimportanttownsoftroopsisdifficulttoaccess,wehavetochangeangles,Shanruggedtrails,Sunandrainontheway,hardshipexceptions,ifthepatrioticandpassionsofthewar,thanthesuccessfulcompletionoftasks.Anoldfrail,rank,long-distanceLawtonregrets,admirable!InNovember1939,IwasadmittedtotheFacultyoflaw,CollegeoflawandpoliticsinShanghai,butresignedfromthepostoffice,bidfarewelltothisshortandmemorablelife.(J)thesiazhenboatburiedJapanesemorningofOctober18,1937,siazhensicktoshunTangQiao-cutters,1fromNanxuntownjiaxingtoJapaneseboats,caughtdraggingbehind3smallboats,loadedwithmilitarygoods.Siazhentoolatetoescape,jumpedashoreJapancatchupwiththeboat,forcinghimtorowaboat.MeanwhilecaughtthemigrantsvillageZhangShun.Siazhenwassickforalongtime,答案D解析显、隐性纯合子杂交后代均为显性，故A、C错误；显性纯合子与杂合子杂交后代也均为显性，B错误；杂合子与隐性纯合子杂交后代，显隐性之比为1∶1，D正确。4．豌豆花的顶生和腋生是一对相对性状，根据下表中的三组杂交实验结果，判断显性性状和纯合子分别为()杂交组合子代表现型及数量甲(顶生)×乙(腋生)101腋生，99顶生甲(顶生)×丙(腋生)198腋生，201顶生甲(顶生)×丁(腋生)全为腋生A．顶生：甲、乙B．腋生：甲、丁C．顶生；丙、丁D．腋生；甲、丙答案B解析由甲(顶生)×丁(腋生)→全为腋生，可推知腋生为显性性状，顶生为隐性性状，只要隐性性状出现，则为纯合子，要使后代全为腋生，亲代中丁一定是显性纯合子。5．将基因型为Aa的豌豆连续自交，在后代中的纯合子和杂合子按所占的比例做得如图所示曲线图，据图分析，错误的说法是()A．a曲线可代表自交n代后纯合子所占的比例B．b曲线可代表自交n代后显性纯合子所占的比例C．隐性纯合子的比例比b曲线所对应的比例要小D．c曲线可代表后代中杂合子所占比例随自交代数的变化答案C解析杂合子Aa连续自交n代后，杂合子所占比例为(1/2)n，纯合子AA和aa所占比例相同为[1－(1/2)n]/2，可知图中a曲线表示纯合子所占比例，b曲线表示显性纯合子或隐性纯合子所占比例，c曲线表示杂合子所占比例。6．(2015·潍坊质检)孟德尔运用豌豆进行杂交实验，提出遗传规律；萨顿研究蝗虫的减数分裂，提出假说“基因在染色体上”；摩尔根进行果蝇杂交实验，证明基因位于染色体上。以上科学发现的研究方法依次是()A．类比推理法、类比推理法、假说—演绎法B．假说－演绎法、类比推理法、类比推理法C．假说－演绎法、类比推理法、假说—演绎法Internet迅速发展无所不在以及诱人的低价位，的确令众多厂商开始采用这种办法，但Internet天生的开放性特点令人无所适从，安全性又成了问题，公司的机密数据一旦在Internet传输，若没有安全性保障，其后果可想而知。villagetemplesCentralOfficeeveryday,carryouttheirduties.CorrespondencerelatingtoeducationbytheChiefofthefirstsectionmarkedmydraftstatement.Workedafterafewmonths,I'vebeenburiedin