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Question;WRITTEN;1);Whatpossiblegametescanbemadefromthefollowinggeneticprofiles?;a.;AaBbCCDdEE;b.;Aabbccddee;2);Giventhatthefollowinggenotypicmarkersandtheircorrespondingphenotypes;a.;makea Punnett;squaretoshowtheresultinggenotypesofthecrossbelow.;b. givethe%occurrence;ofthedifferentphenotypes.;A=blackhaira=redhair;B=browneyesb=violeteyes;C=over5'11"inheight;c=lessthan5'2"inheightD=detached;earlobe;d=attachedearlobeE=widowspeek;e=nowidowspeek;AaBbCCDdEEXaabbccddee;3) Discusswhatwouldhappentothecellcycleifthecell;couldnotpolymerizethe tubulinsubunits.;4);Drawthegeneticmaptoscale(1mm=1%)forthefollowinggenes(A,B,C,D)foundonthesamechromosome,usingtheprovidedpercent;recombination.;A;0;19%;5%;21%;B;0;14%;2%;c;0;16%;D;0;A;B;c;D;1.;Whichofthe;followingorganismsdoesNOTreproducecellsbymitosisandcytokinesis?;A);cow;B);bacterium;C);mushroom;D);cockroach;E);bananatree;2.;1;Ifthere;are12chromosomesinan;animalcellin;theG;stageofthecellcyclewhat;isthe;diploidnumberofchromosomesforthisorganism?;A);6;B);12;C);24;D);36;E);48;3. How;dothedaughtercellsattheendofmitosisandcytokinesiscomparewiththeirparent;cellswhenitwas;inG,ofthecell;cycle?;A) The;daughtercellshavehalftheamountofcytoplasm;andhalfthe;amountofDNA.;B) The;daughtercellshavehalfthe numberofchromosomesand;halftheamountofDNA.;C) The;daughtercellshavethe;samenumberofchromosomesand halftheamountofDNA.;D) The;daughtercellshavethe;same numberofchromosomesandthe same;amountofDNA.;E) The daughtercellshavethe same;numberofchromosomesandtwicetheamountofDNA.;4.;Cellsthathavestopped;dividingandaredifferentiatingare;A) cancercells.;B) inthe;Gphaseofthecellcycle.;2;C) in;theG;1;phaseofthecellcycle;D) inthe;Sphaseofthecellcycle.;E) inthe;Mphaseofthecellcycle.;Thequestionsbelowconsistoffivephrases;orsentencesconcernedwiththecellcycle.Foreach phraseorsentence,selecttheanswerJetterfrom;belowthatismostclosely;relatedtoit.Eachanswermaybeusedonce;morethanonce;ornotatall.;A);G;0;B);G;C) S;D);2;G;E);M;5. The;restrictionpoint?occurshere.;6.;Theshortest;partofthecellcycle.;7.;Chromosomesareduplicatedduringthisphase.;Thequestionsbelowrefertothefollowing;terms. Each;termmaybeusedonce,morethanonce,ornotatall.;A. telophase.;B. anaphase.;C. prometaphase.;D. metaphase.;E. prophase.;8.;Centriolesbegintomoveapartintheanimalcells.;9. Twocentrosomesarearrangedat oppositepolesofthe cell.;10.;Centromeresuncouple,sisterchromatidsareseparated,andthetwonewchromosomesmoveto;oppositepolesofthecell.;11.;Ifcellsintheprocessofdividing;aresubjectedtocolchicine,a;drugthatinterfereswiththe functioningofthespindleapparatus,at whichstagewillmitosisbearrested?;12.;Thecentromereisaregioninwhich;A);chromatidsareattachedtooneanother.;B);metaphasechromosomesbecomealigned.;C);chromosomesaregroupedduringtelophase.;D);thenucleus;islocatedpriortomitosis.;E);newspindlemicrotubulesform.;13.;Allofthefollowing;arecharacteristicoftelophaseofmitosisEXCEPT;A);Cytokinesisbegins.;B);Eachchromosomeismadeoftwochromatids.;C);Thenuclearenvelopereappears.;0) Chromosomesbegintouncoil.;E);Astralmicrotubulesdisappear.;14.;Acellcontaining92chromatidsatthestartofmitosiswould,atitscompletion,produce;cellscontaininghow;manychromosomes?;A);12;B);16C)230)46;E)92;15.;Ifthere;are20centromeresinacell,how;manychromosomesarethere?;A);106)20;C)30;0)40;E)80;16.;InherearetwelvecentromeresinacellinG1ofthecellcycle,whatisthediploidnumber;ofchromosomes?;A);6;8)12;C)24;0)36;E)48;17.;AllofthefollowingoccurduringthelatterstagesofmitoticprophaseEXCEPT;A);The centriolesmoveapart.;B);Thenucleolus;disintegrates.;C);Thenuclear;envelopedisappears.;D);Chromosomes areduplicated.;E);Thespindleisorganized.;18.;Ifthehaploidnumberforaspecies;is3,eachdividingdiploidcellwillhavehowmanychromatidsatmetaphase?;A);3 8)6;C)9;0)12;E)18;19.;AllofthefollowingoccurduringmitosisEXCEPT;A);thecoilingofchromosomes.;B);thedivisionofcentromeres.;C);the formationofaspindle.;D);thesynthesisofDNA.;E);thedegradationofthenuclear;envelope.;20.;Howmany;chromosomeswillacell;haveduringmitoticanaphaseifthediploidchromosomenumberis4?;A) 1;B)2;C)4;D);8;E) 16;21.;Recentresearchhasindicated;thatcancercells;A);transformnormal;cellsbyalteringgenesinvolvedinthecontrolofmitosis.;B);alwaysdevelopintoatumor.;C)containmorethanthenormalnumber;of chromosomes.;D);areunable;tocompletethecellcycle aftertheSphase.;E) enterandexittheGo;phasethree timesbeforetheydivide.;22. Acellwith20chromosomes(diploidnumber)goesthroughthecellcycle. Thenumber of chromosomesafterdoublingtheDNAintheSphaseis;A)20.;8)40.;C)10.;D);calledtheSnumberofchromosomes.;E) calledhaploid.;23.;TaxolisananticancerdrugextractedfromthePacificyewtree.Inanimalcells;Taxoldisruptsmicrotubuleformationbybindingtomicrotubulesandacceleratingtheirassemblyfrom;theproteinprecursor;tubulin.Surprisingly,thisstopsmitosis.Specifically,Taxolmustaffect;A);thefibersofthemitoticspindle.;B);anaphase.;C)formationofthecentrioles.;D);chromatidassembly.;E);theSphaseofthecellcycle.;24.;Acellisjust;beginningtheSphase;ofthecellcycle.Itisfusedtoacellinmetaphaseofmitosis.Whichofthefollowing;bestdescribeswhatwouldhappentothenucleus;ofthefirstcells?;A);ItwouldstopDNAsynthesisandimmediatelydivide,withessentiallynoG;2;B);ItwouldcontinuetocompleteS,haveashortG,andthendivide.;2;C);Itwould;stopDNA;synthesis,undergoarelativelynormalG,and;then divide.;2;D);Itwouldcontinue;tocompleteS,have;anormalG,andthendivide.;2;E);ItwouldimmediatelystopSandenterG;0;25.;Density-dependentinhibitionuis explainedbywhichofthefollowing;A);Ascellsbecomemorenumerous,they;beingtosqueeze;againsteachother,restrictingtheirsizeand;abilitytoproduce;controlfactors.;B) Ascellsbecomemorenumerous,theamountofrequiredgrowthfactorsandnutrientsper;cellbecomesinsufficienttoallowforcellgrowth.;C);Ascellsbecomemorenumerous,theprotein;kinasestheyproducebegintocompetewitheach;other;suchthattheprotein;producedbyonecellessentially cancelthoseproducedbyits neighbor.;D);Ascellsbecomemorenumerous,moreandmoreofthementerG?;0;E);Ascellsbecomemore;numerous,thelevelofwaste;productsincreases,eventuallyslowingdownmetabolism.;26.;Thedrugchloralhydratepreventselongationofmicrotubulesbypreventingthe;additionofnewsubunitstothegrowingend. Duringwhichstageof;mitosiswouldchloralhydratebemostharmful?;A) prophase.;B) metaphase.;C) anaphase.;D) telophase.;27. Movementofthechromosomesduringanaphasewouldbemostaffected;bya drugthat;A);reducedcyclin;concentrations.;B) increasedcyclin concentrations.;C) preventedelongationofmicrotubules.;D) preventedshorteningofmicrotubules.;E) preventedattachmentofthemicrotubulestothekinetochore.;28. The;phasesofmeiosisthatcausethemostvariation;inthefourresulting;daughtercellsare;A) prophaseIandtelophaseII.;B);prophaseIIandanaphaseII.;C) metaphaseIandtelophaseII.;D) anaphaseIandprophaseII.;E) prophaseIandanaphaseI.;29.;Ifthelivercellsofananimalhave24chromosomes,thespermcells;wouldhavehowmanychromosomes.;A);12;8)24;C)48;D);twicethediploidnumber.;E);halfthehaploidnumber.;30.;Whichofthefollowingeventsoccurs duringprophaseIofmeiosis?;A);reductioninchromosomenumber.;B);segregationofalleles;ofunlinkedgenes.;C) synapsisandcrossingover.;D) duplicationofchromatids.;E) segregationofalleles;oflinkedgenes.;31. How;doesthesexuallifecycleincreasethegeneticvariationinaspecies?;A) by;producinggameteswithdifferent;combinationsofparental;chromosomes.;B) by;allowingthecombinationofchromosomesfromtwodifferentindividuals.;C) by;allowingrecombination ofalleleson achromosome;D) Both;AandBarecorrect.;E) A,B;andCarecorrect.;32. Whichofthefollowingistrueofaspecies;thathasachromosome;numberof2n=16?;A) The;species isdiploidwith32chromosomes.;B) The;specieshas16differenttypes;ofchromosomes.;C)Thereare16homologouspairs.;D) DuringtheSphaseofthe cell;cycletherewillbe32separate;chromosomes.;E) Agametefromthisspecieshas8chromosomes.;33. Any;geneticdifferencesinacloneareduetowhichprocess?;A);independentassortment.;B) mutation.;C) crossingover.;D) recombination.;E) synapsis.;34. WhichofthefollowingisFALSEincomparingprophaseIofmeiosisandprophase;ofmitosis?;A) The;chromosomescondenseinboth.;B) Tetradsforminboth.;C)The;nuclearenvelopedisassemblesinboth.;D);Aspindleforms;inboth.;E);Eachchromosomehastwochromatids;inboth.;35.;Inagivenorganism,howdocellsatthecompletionofmeiosiscomparewithcellsthatarejustabouttobeginmeiosis?;A);Theyhavetwicetheamountofcytoplasm;andhalftheamountof DNA;B) They;have halfthenumber;ofchromosomesandhalftheamountofDNA.;C)TheyhavethesamenumberofchromosomesandhalftheamountofDNA.;D);Theyhavehalfthenumberofchromosomesandone-fourththeamount;ofDNA.;E);Theyhavehalftheamount;ofcytoplasmandtwicethe;amountofDNA.;36.;Whatisakaryotype?;A) the;phenotypeofanindividual.;B) the;genotypeofanindividual.;C) a;uniquecombination;ofchromosomesfound;inagamete;D) the;kind;ofnucleusacellhas.;E) amethodoforganizingthehomologouschromosomesofacellinrelationtotheirnumber,sizeand;type.;Refertothedrawingofasinglepairofhomologouschromosomesastheymightappear;duringvariousstagesofeffher;mitosisormeiosis;andanswerthefollowingquestions.;I I;37.;Whichdiagramrepresentslateprophase;Iofmeiosis?;A);I 8)II C)Ill D)IV E)V;38.;Acouple;whoareboth carriersforthegeneforcysticfibrosishavetwo children;whohavecysticfibrosis. Whatistheprobabilitythattheirnextchildwillhavecystic fibrosis.;A);0%B)25%C)50%D)75%;E)100%;Usethefollowinginformationtoanswerthequestions;below. AwomanwhobelongstobloodgroupAandis RhpositivehasadaughterwhoisOpositive;andasonwhoisBnegative. Rhpositive(RR)is a;simpledominantoverRhnegative;(ff).;39.;Whichofthefollowingisapossiblegenotype;fortheson?;BB;A) IIrr;88;B);IIRR;8;C);IiRr;8;D);Iirr;88;E)11Rr;40. In;crossingahomozygousrecessivewithaheterozygote,whatisthechance;ofgettinganoffspringwithahomozygousrecessive;phenotype?;A);0% B)25%C)50% D)75%E)100%;41. Blackfurinmice(8)isdominanttobrownfur(b).Shorttailsmisdominanttolongtails(t).;Whatproportionoftheprogeny;ofthecrossBbTtxBBttwillhaveblackfurandlongtails?;A)1/16B)3/16C)6/16D)8/16E)9/16;Useofthefollowingkeytoanswerthefollowing;questions. Each;answermaybeusedonce,morethanonce,ornotatall.;A. Thestatementistrueformitosisonly.;B. ThestatementistrueformeiosisIonly.;C. ThestatementistrueformeiosisIIonly.;D. Thestatementistrueformitosisand meiosisI.;E. Thestatementistruefor;mitosisandmeiosisII.;42. Homologouschromosomessynapse;andcrossingoveroccurs.;43.;Thisoccurswhenacelldividestoformtwocells;thataregeneticallyidentical. 44. Centromeresuncoupleandchromatidsareseparatedfromeachother.;45.;Crossingoveroccursduringwhichphaseofmeiosis?;A) prophaseI;B);anaphaseI;C);telophase;I;D) prophaseII;E) metaphaseII;46. Whichofthefollowingisthetennforahumancellthatcontains 22pairsof autosomesandtwoXchromosomes.;A) anunfertilizedeggcell.;8)aspenncell;C);a malesomaticcell;D);afemalesomatic;cell;E)BothAandDarecorrect.;47.;Peoplewhohaveredhair usuallyhavefreckles.Thiscanbestbeexplainedby;A);linkage.;8)reciprocaltranslocation.;C);independentassortment.;D);sex-influencedinheritance.;E)nondisjunction.;48. AmanwhocarriesanX-linkedallele;willpassitonto;A);allofhisdaughters.;B) halfofhisdaughters.;C) allofhissons.;D);halfofhissons.;E)allofhischildren.;49. Whatdoallhumanmalesinheritfrom;theirmother?;A);mitochondrialDNA;8)Xchromosome;C);male-patternbaldnesstrait;D);OnlyAandBarecorrect;E)A,B,andCarecorrect.;50. Basedonthefollowingisamapoffourgenesonachromosome,whichgeneswouldbetransferredtogether;mostoften?;A w E G;5 I 3 12;A);AandW;8) WandE;C) EandG;D) AandE;E) AandG

 

Paper#62549 | Written in 18-Jul-2015

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