第1題Genemutation,generecombination,andchromosomalvariationhavethetruththat____incommon.AAll

producenewgenes.BAll

producenewgenotypes.CAll

produceheritablevariations.DAll

areallvisibleunderamicroscope.第2題Agenemutationisachemicalchangewithinagenelocusonachromosomethatformsanallelicrelationshipwiththeoriginalgene.第1題In1910,Morganandothersdiscoveredthe____phenomenonusingDrosophilamelanogasterasatestsubjectandcreatedthetheoryofgenetics.正確答案：:geneticlinkage第2題TherangeofvariationofexchangevaluesbetweentwolinkedgenesisA0~50%B50%~100%C0~100%D50%~80%第3題WhichofthefollowingphenomenaisnotrelatedtogeneticlinkageACrossingphenomenonBGenerecombinationCGenemutationDGenelinkage第4題TheessenceofthelawofgenesegregationisAAllelessegregatewiththeseparationofhomologouschromosomes.BTheratioofsegregationofF2traitsis3:1.CTheratioofsegregationoftraitsintheprogenyaftertestcrossis1:1.DF2showssegregationoftraits.第5題TheessenceofthelawofindependentassortmentofgenesisATheratioofsegregationoftraitsinthesecondgenerationis9:3:3:1.BTheemergenceofnewtypesoftraitsinthesecondgenerationthataredifferentfromtheparentaltraits.CThesegregationratioofthetestcrossprogenyis1:1:1:1.DDuringgameteformation,allelesonhomologouschromosomessegregateandnon-allelesonnon-homologouschromosomesindependentlyassort.UnitTest第1題Quantitativetraitsaremoresusceptibletoenvironmentalconditionsthandiscretetraits.第2題It’scommontocalltraitsthatshowcontinuousvariationas____,suchasplantheight,floweringperiod,andsinglefruitweight.正確答案：:quantitativetraitsUnitTest第1題____isthefirstandthelargestsourceofagricultureandtheoriginofcultivatedplantsintheworld?AChina’scenteroforigins.BCentralAsia’scenteroforigins.CCentralAmerica’scenteroforigins.DMediterranean’scenteroforigins.第2題China'sZhangjiajieNationalForestParkpreservesrichgermplasmresources,andthismethodofpreservationbelongstothefontASeedstorageandpreservation.BPreserveinsitu.CTissueculturepreservation.DExsiteplantingpreservation.第3題Ofthefollowingoptions,thegermplasmresourcethatuniquelybelongs

toChinaisAPaulownia.Bkiwifruit.Cketeleeriafortunei.DTaiwanesephotinia.UnitTest第1題Thewayofselectinggoodsingleplants,growingtheminseparatelinesforcomparison,andselectingthesuperiorlinesforpropagationintovarietiesiscalledAImprovedbulk-populationselection.BIndividualselectionmethod.CFoundationseedproductionwiththree-fieldsystem.DEliteseedproduction.第2題Thewaytoobtainnewvarietiessuitableforbreedingobjectivesbymeansofselection,isolation,purificationandcomparativeidentificationusingnaturalgeneticvariationofexistinggardenplantspeciesandvarietiesisAIntroductionofplantvarieties.BSelectivebreeding.CCcrossbreeding.DMutationbreeding.UnitTest第1題ThebreedingmethodthatimprovesthegeneticcompositionofapopulationbyselectingamongthepopulationsofplantsformedaftertheseedingofseedsproducedbynaturalpollinationisASimplebreeding.BEvolutionarybreeding.CSexualcrossbreeding.DSeedlingselectionbreeding.第2題ThemostbasicselectivebreedingmethodsforsexuallypropagatedplantsareAGroupselectionmethodandmixedselectionmethod.BIndividualselectionmethodandgroupselectionmethod.CMaternallineselectionmethodandgroupselectionmethod.DMaternallineselectionmethodandmixed

selectionmethod.第3題Whichofthefollowingprinciplesofparentalselectionincrossbreedingarecorrect?A

Selectparentsfromasmallnumberofgermplasmresources.BTrytousegermplasm

materialswithrelativelymanyelitetraits.CDefinethetargettraits,highlightthekeypoints,andprioritizethem.DSelectmaterialswithweakheritabilityforelitetraitsandlowgeneral

combiningability.EEmphasizetheselectionoflocalvarieties.正確答案：BCE第4題Theaverageperformanceofatraitinthehybridprogenyofaparentalself-fertilizinglineinaseriesofhybridcombinationsiscalledAGeneralcombiningabilityBSpecialcombiningabilityCHeritabilityDAffinityUnitTest第1題Seedproductionusinghybridadvantages

ischaracterizedbythisASeedcanbeharvestedeachyeardirectlyfromplantsinproductionorseedfields.BFirstgenerationofhybridsmustbeformulatedeachyearusingtheparents.CSeedmustbeproducedusinginvitrorapidpropagation.D

Seedsmustbeproducedannuallybyself-crossingusingtheparents.第2題Themainfeatureofthehybridadvantages

breedingprogramisA“selectionandthencrossbreeding”.B

“Crossbreedingandthenselection”.C“Crossbreedingandthenpurification”.D“Purificationandthencrossbreeding”.第3題DistanthybridsterilitymeansAItisdifficulttoobtaindistant

hybrids.BRemotehybridsarenotcapableofreproduction.CFemaleandmalegametesdonotformanormalzygote.DSelf-incompatibilityofmaleandfemalegametes.第4題Thecrossing

oftheFangchenggoldencamelliaandthe'HongZhuangSuGuo'camelliaisABackcross.BClosehybridization.CDistant

hybridization.DFour-waycross.第5題CrossbreedingmethodofhsienriceandjaponicaricebelongstowhichofthefollowingtypesofdistanthybridizationAInterspecieshybridization.BIntergenerichybridization.CInter-subspecieshybridization.DGeographicaldistanthybridizationUnitTest第1題AseedlingpopulationisdefinedasASeed-propagatedprogeny

population.BAsexual-propagatedprogeny

population.CInvitropropagatedprogeny

population.DProgenyfromthefruitingbody.第2題Acommonmethodoffixinghybridadvantages

obtainedbyclonalcrossbreedingisAAsexualpropagation.BChromosomedoublingmethod.CSexualcrossingmethod.DBalancedlethalmethod.第3題OnecauseofvariationintheprogenyofseedlingpropagationofgardenplantsisAGeneregulation.BGenerecombination.CNaturalselection.DArtificialmutation.UnitTest第1題In1993,anewvarietyofchrysanthemum'YuFengHuanChao'wasbredfrombudsportofchrysanthemum'FengLiuXiaoSa'attheWaterParkinTianjin,China.ThebreedingmethodsuccessfullyusedherewasAIntroductionofplantvarieties.BCrossbreeding.CRadiationbreeding.DBudsportselection.第2題____inthefollowingisnotthecharacteristicofbudsport.ADiversityofbudsportexpression.BRepertoireofbudsport.CNon-parallelismofbudsport.DLimitationofbudsporttraits.第3題Inthefollowingexamples,whichdoesnotbelongtoartificialmutationbreedingAMutationbreedingofpeonyseedswithacertaindoseofgammaraystoobtainnewvarieties.BHighyieldstrainsareobtainedbytreatingpenicilliumwithacertaindoseofX-ray.CAcertainproportionofalbinoseedlingsappearintheself-crossedprogenyofacornplant.DObtainingnewvarietiesbyinducingmutationsinplantswithlaserirradiation.第4題Tobothincreasethefrequencyofmutationinacropandtostabilizethemutatedtraitsintheprogenymorequickly,___canbeadopted.ACrossbreedingmethod.BMutationbreedingmethod.CHaploidbreeding.DPolyploidbreeding.第5題ThechemicalagentcommonlyusedtoinducepolyploidyisASodiumhydroxide.BMercuricchloride.CEthylmethylsulfone.DColchicine.第6題WhichofthefollowingisanincorrectstatementaboutthecharacteristicsofchemicalmutationbreedingAExtendingbreedingyears.BIncreasingmutationfrequency.CStrongspecificity.DEasytooperate.第7題WhichofthefollowingisnotacommonlyusedchemicalmutagenAAntibioticsBH2OCAlkylatingagentsDNucleobaseanalogs第8題Thedoseofradiationthatresultsinthesurvivalorgrowthofirradiatedmaterialat40%ofthecontrolisAlethaldose.BSemi-lethaldose.CSemi-dwarfingdose.DCriticaldose.第9題WhichofthefollowingisnotasourceofelectromagneticradiationAX-rayBγrayCLaserDNeutronUnitTest第1題Thefollowingstatement

ofgeneticengineeringiscorrect.AGeneticengineeringisbiologicalengineeringatthecellularlevel.BTheproductsofgeneticengineeringareallbeneficialtohumanbeings.CThemutationsproducedbygeneticengineeringareartificialmutations.DOneoftheadvantagesofgeneticengineeringbreedingisitspurposefulness.第2題Atpresent,geneticallymodifiedvirus-resistant____,etc.haveenteredfieldproduction,andgeneticallymodifiedpest-resistantpoplar,pine,cotton,rice,andtobaccohavealsobeguntoplayaroleinproduction.A

tomatoes,peppersBpotatoes,redishesCcucumbers,eggplantsDcabbages,ChinesecabbagesUnitTest第1題Geneticmarkersmainlyincludemorphologicalmarkers,cytologicalmarkers,bio