Test Bank For Genetics A Conceptual Approach 7th Edition By: Benjamin A. Pierce Chapter-By-Chapter Multiple-Choice Questions With Rationales. Updated Version | Graded A+

TestxBankxForxGeneticsxAxConceptualxApproachx7thxEditionxBy:xBenja
minxA.xPierce

,Chapterx1:xIntroductionxtoxGeneticsxfromxGenetics:xAxConceptualxApproach



1. Whichxofxthexfollowingxbestxdefinesxgenetics?
A) Thexstudyxofxlivingxorganisms
B) Thexstudyxofxgenesxandxheredity
C) Thexstudyxofxdiseasesxandxtheirxcauses
D) Thexstudyxofxcellxstructures
CorrectxAnswer:xB)xThexstudyxofxgenesxandxheredity
Rationale:xGeneticsxfocusesxspecificallyxonxhowxtraitsxandxcharacteristicsxarexinheritedxt
hroughxgenes.xThisxfoundationalxknowledgexisxcrucialxforxunderstandingxmorexcomplexxg
eneticxconcepts.xUnderstandingxgeneticsxisxessentialxforxnurses,xasxtheyxmayxdealxwithxge
neticxconditionsxandxcounseling.
2. Whichxtermxdescribesxthexobservablexcharacteristicsxofxanxorganism?
A) Genotype
B) Phenotype
C) Allele
D) Chromosome
CorrectxAnswer:xB)xPhenotype
Rationale:xThexphenotypexrefersxtoxthexphysicalxexpressionxofxgeneticxtraits,xwhilexgeno
typexrefersxtoxthexgeneticxmakeup.xNursesxmustxbexablextoxdifferentiatexbetweenxthesexter
msxtoxprovidexeffectivexeducationxandxsupportxtoxpatientsxregardingxgeneticxconditions.
3. WhatxisxthexprimaryxfunctionxofxDNA?
A) Toxprovidexenergyxforxcellularxprocesses
B) Toxstorexandxtransmitxgeneticxinformation
C) Toxcatalyzexbiochemicalxreactions
D) Toxservexasxaxstructuralxcomponentxofxcells
CorrectxAnswer:xB)xToxstorexandxtransmitxgeneticxinformation
Rationale:xDNAxholdsxthexinstructionsxforxthexdevelopmentxandxfunctioningxofxlivingxorgani
sms,xwhichxisxcentralxtoxgeneticxstudies.xUnderstandingxthexrolexofxDNAxisxvitalxforxnurses,xe
speciallyxwhenxdiscussingxgeneticxtestingxandxcounseling.
4. Whichxofxthexfollowingxbestxdescribesxalleles?
A) Differentxformsxofxaxgene
B) Thexsamexformxofxaxgene
C) Chromosomesxthatxdeterminexsex
D) Cellsxthatxcontainxgeneticxmaterial
CorrectxAnswer:xA)xDifferentxformsxofxaxgene
Rationale:xAllelesxrepresentxvariationsxofxaxparticularxgene,xcontributingxtoxgeneticxdive
rsity.xNursesxmustxunderstandxallelesxtoxhelpxexplainxinheritancexpatternsxandxgeneticxdis
ordersxtoxpatients.
5. Ifxaxpersonxhasxtwoxidenticalxallelesxforxaxtrait,xtheyxarexconsidered:
A) Homozygous
B) Heterozygous
C) Dominant
D) Recessive

, CorrectxAnswer:xA)xHomozygous
Rationale:xHomozygousxindividualsxhavextwoxcopiesxofxthexsamexallele,xwhilexheterozy
gousxindividualsxhavexdifferentxalleles.xThisxdistinctionxisxessentialxinxgenetics,xasxitxinflu
encesxthexexpressionxofxtraitsxandxthexriskxofxgeneticxdisorders.
6. Whatxisxaxgene?
A) AxsegmentxofxDNAxthatxcodesxforxaxprotein
B) Thexphysicalxlocationxofxchromosomes
C) ThexcompletexsetxofxDNAxinxanxorganism
D) Axstructurexthatxcarriesxnutrientsxinxcells
CorrectxAnswer:xA)xAxsegmentxofxDNAxthatxcodesxforxaxprotein
Rationale:xGenesxarexthexbasicxunitsxofxheredityxandxarexcrucialxforxproducingxproteinsxt
hatxcarryxoutxvariousxfunctionsxinxthexbody.xUnderstandingxgenexfunctionxisxessentialxforx
nursesxtoxassessxgeneticxrisksxandxprovidexappropriatexpatientxeducation.
7. Whichxgeneticxdisorderxisxcausedxbyxaxsinglexgenexmutation?
A) Cysticxfibrosis
B) Downxsyndrome
C) Turnerxsyndrome
D) Hemophilia
CorrectxAnswer:xA)xCysticxfibrosis
Rationale:xCysticxfibrosisxisxanxautosomalxrecessivexdisorderxresultingxfromxmutationsxin
xthexCFTRxgene,xillustratingxMendelianxinheritancexpatterns.xRecognizingxsuchxdisorders
xallowsxnursesxtoxprovidexbetterxcarexandxmanagementxstrategiesxforxaffectedxindividuals.

8. InxMendelianxinheritance,xwhatxisxthexexpectedxphenotypicxratioxofxaxmonohybri
dxcross?
A) 1:1
B) 3:1
C) 9:3:3:1
D) 1:2:1
CorrectxAnswer:xB)x3:1
Rationale:xAxmonohybridxcrossxtypicallyxresultsxinxax3:1xratioxofxdominantxtoxrecessivex
phenotypes.xThisxknowledgexisximportantxforxnursesxinvolvedxinxgeneticxcounseling,xasxit
xhelpsxexplainxinheritancexpatternsxtoxfamilies.

9. Whichxofxthexfollowingxrepresentsxaxcarrierxforxaxrecessivexgeneticxdisorder?
A) AA
B) Aa
C) aa
D) Nonexofxthexabove
CorrectxAnswer:xB)xAa
Rationale:xAxcarrierxhasxonexdominantxandxonexrecessivexallele,xshowingxnoxsymptomsxo
fxthexdisorderxbutxcapablexofxpassingxthexrecessivexallelextoxoffspring.xUnderstandingxcar
riersxisxvitalxinxgeneticxcounselingxandxassessingxfamilyxrisks.
10. Whatxisxthexsignificancexofxthexhumanxgenomexproject?
A) Toxclonexhumanxgenes
B) Toxmapxthexentirexhumanxgenome
C) Toxidentifyxgeneticxdisordersxonly
D) Toxenhancexagriculturalxcrops

, CorrectxAnswer:xB)xToxmapxthexentirexhumanxgenome
Rationale:xThexHumanxGenomexProjectxaimedxtoxsequencexandxunderstandxallxthexgenes
xofxthexhumanxspecies,xwhichxhasxvastximplicationsxforxmedicinexandxgenetics.xNursesxsh
ouldxbexawarexofxthisxprojectxasxitxinformsxgeneticxtestingxandxtreatmentxoptions.
11. Whichxofxthexfollowingxisxanxexamplexofxaxdominantxtrait?
A) Bluexeyes
B) BloodxtypexO
C) Hitchhiker'sxthumb
D) Cysticxfibrosis
CorrectxAnswer:xC)xHitchhiker'sxthumb
Rationale:xHitchhiker'sxthumbxisxaxdominantxtrait;xthexothersxarexeitherxrecessivexorxbloo
dxtypesxdeterminedxbyxcodominance.xUnderstandingxdominantxtraitsxisxcrucialxforxnurses
xwhenxdiscussingxgeneticxinheritancexwithxpatients.

12. Inxaxpedigreexchart,xaxfilledxsymbolxtypicallyxrepresentsxwhichxofxthexfollowing?
A) Carrier
B) Affectedxindividual
C) Male
D) Female
CorrectxAnswer:xB)xAffectedxindividual
Rationale:xFilledxsymbolsxinxaxpedigreexindicatexindividualsxexpressingxaxparticularxtrait
xorxconditionxbeingxstudied.xKnowledgexofxpedigreexchartsxisxessentialxforxnursesxassessin
gxfamilyxhistoriesxandxgeneticxrisks.
13. Whichxofxthexfollowingxisxtruexregardingxsex-linkedxtraits?
A) Theyxarexinheritedxequallyxbyxmalesxandxfemales.
B) Theyxarexalwaysxexpressedxinxmales.
C) TheyxarexonlyxfoundxonxthexYxchromosome.
D) Theyxarextypicallyxmorexcommonxinxmalesxthanxfemales.
CorrectxAnswer:xD)xTheyxarextypicallyxmorexcommonxinxmalesxthanxfemales.xRationa
le:xSex-
linkedxtraitsxarexoftenxcarriedxonxthexXxchromosome,xleadingxtoxhigherxexpressionxinxm
ales,xwhoxhavexonlyxonexXxchromosome.xNursesxshouldxunderstandxsex-
xlinkedxinheritancexpatternsxforxeffectivexgeneticxcounseling.

14. WhatxisxthexrolexofxmessengerxRNAx(mRNA)xinxproteinxsynthesis?
A) Itxcatalyzesxthexformationxofxproteins.
B) ItxcarriesxgeneticxinformationxfromxDNAxtoxribosomes.
C) ItxhelpsxinxDNAxreplication.
D) ItxprotectsxDNAxfromxdegradation.
CorrectxAnswer:xB)xItxcarriesxgeneticxinformationxfromxDNAxtoxribosomes.
Rationale:xmRNAxisxcrucialxforxtranslatingxgeneticxinformationxintoxproteins,xfunctionin
gxasxaxtemplatexforxproteinxsynthesis.xUnderstandingxmRNA'sxrolexaidsxnursesxinxdiscuss
ingxgeneticxtherapiesxandxtreatments.
15. Whichxtermxdescribesxanxorganism'sxgeneticxmakeup?
A) Phenotype
B) Genotype
C) Allele
D) Trait
CorrectxAnswer:xB)xGenotype