IB 150 FINAL EXAM (3&4) PRACTICE QUESTIONS A
ANSWERS
Which cmechanism cis cmost cdirectly caffected cby cmigration?
a) cmutation
b) cgenetic cdrift
c) cgene cflow
d) cnatural cselection
e) csexual cselection c- cCORRECT cANS✔✔c) cgene cflow
How cmany cof cthe cmechanisms c(mutation, cgenetic cdrift, cgene cflow, cnatural cselection, csexual cs
cnew calleles cto ca cpopulation c(consider c"new" cto cbe cany callele cthat cdid cnot cpreviously cexist cin
a) cone
b) ctwo
c) cthree
d) cfour
e) cfive c- cCORRECT cANS✔✔c) cthree
How cmany cof cthe cmechanisms c(mutation, cgenetic cdrift, cgene cflow, cnatural cselection, csexual cs
cmeasurable cdeviation cfrom cHardy-Weinberg cequilibrium cin conly cone cgeneration? c(Assume ca cp
cindividuals cin cthe cparental cgeneration)
a) cone
b) ctwo
c) cthree
d) cfour
e) cfive c- cCORRECT cANS✔✔a, cb, cc, cd, cor ce c(every canswer cis cacceptable)
Match cthe cevolutionary cprocess cto cit's ceffect con cgenetic cvariation. cAnswers ccan cbe cused cmor
a) cnatural cselection conly
b) cgenetic cdrift conly c
c) cboth cnatural cselection cand cgenetic cdrift
d) cmutation
e) cgene cflow c
4. cALWAYS cincreases cgenetic cvariation
, b) cit cincreases chomozygosity
c) cit cviolates cthe cHardy-Weinberg cassumptions
d) cit cdecreases cthe cpopulation's caverage cfitness
e) cit cdoes cnot cchange cthe cpopulation's callele cfrequencies c- cCORRECT cANS✔✔e) cit cdoes cnot
cfrequencies
Why cdo cinbred cpopulations ctypically chave clower cfitness cthan cnon-inbred cpopulations? c
a) cinbreeding ccauses creproductive cisolation
b) cinbreeding cincreases cthe crate cof cgenetic cdrift
c) cinbreeding cincreases cthe cfrequency cof cmutation c
d) cinbreeding ccan cincrease cthe cfrequency cof charmful calleles
e) cinbreeding ccan cincrease cthe cfrequency cof cgenotypes cwith clow cfitness c- cCORRECT cANS✔✔
cthe cfrequency cof cgenotypes cwith clow cfitness
A cpopulation cof cdeer cwas csurveyed cin c2011 cand cagain c2012, cand cthe cgenotypic cfrequencies c
2011- cAA c= c0.49, cAa c= c0.42, caa c= c0.09
2012- cAA c= c0.63, cAa c= c0.14, caa c= c0.23
What cprocess cis cmost clikely cresponsible cfor cthe cobserved cchanges? c
a) callopatry
b) cmutation
c) cinbreeding
d) cgenetic cdrift
e) cnatural cselection c- cCORRECT cANS✔✔c) cinbreeding
Species cexhibit csexual cdimorphism cwhen cthe cmales chave cdifferent cphenotypes cthan cfemales. c
cexplains cwhy ca cspecies cwould cshow csexual cdimorphism c(Assume cthat cphenotypic cdifferences
care cgenetically cdetermined). c
a) callopatry
b) cmutation
c) cgenetic cdrift
d) cnon-random cmating
e) creproductive cisolation c- cCORRECT cANS✔✔d) cnon-random cmating
The cscissor-tailed cflycatcher cis cthe cstate cbird cof cOklahoma. cMales chave cmuch clonger ctail cfeat
cthe clongest ctail cfeathers cmate cearlier cin cthe cbreeding cseason, cand cmore coften. cThe clong ctail
cresult cof: c
a) cgene cflow
b) cinbreeding
c) cgenetic cdrift
d) csexual cselection cby cfemale cchoice
e) csexual cselection cby cmale-male ccompetition c- cCORRECT cANS✔✔d) csexual cselection cby cfem
What cinformation cdo cyou cneed cto cdetermine cif ctwo cmice cfrom cdifferent cpopulations cbelong cto
cbiological cspecies cconcept?
a) cif cthey clive cin cthe csame chabitat
b) cif cthe cwill cmate cwith cone canother
c) cif cthey ccan cproduce cfertile coffspring c
d) cif cthey chave csimilar cphenotypes
ANSWERS
Which cmechanism cis cmost cdirectly caffected cby cmigration?
a) cmutation
b) cgenetic cdrift
c) cgene cflow
d) cnatural cselection
e) csexual cselection c- cCORRECT cANS✔✔c) cgene cflow
How cmany cof cthe cmechanisms c(mutation, cgenetic cdrift, cgene cflow, cnatural cselection, csexual cs
cnew calleles cto ca cpopulation c(consider c"new" cto cbe cany callele cthat cdid cnot cpreviously cexist cin
a) cone
b) ctwo
c) cthree
d) cfour
e) cfive c- cCORRECT cANS✔✔c) cthree
How cmany cof cthe cmechanisms c(mutation, cgenetic cdrift, cgene cflow, cnatural cselection, csexual cs
cmeasurable cdeviation cfrom cHardy-Weinberg cequilibrium cin conly cone cgeneration? c(Assume ca cp
cindividuals cin cthe cparental cgeneration)
a) cone
b) ctwo
c) cthree
d) cfour
e) cfive c- cCORRECT cANS✔✔a, cb, cc, cd, cor ce c(every canswer cis cacceptable)
Match cthe cevolutionary cprocess cto cit's ceffect con cgenetic cvariation. cAnswers ccan cbe cused cmor
a) cnatural cselection conly
b) cgenetic cdrift conly c
c) cboth cnatural cselection cand cgenetic cdrift
d) cmutation
e) cgene cflow c
4. cALWAYS cincreases cgenetic cvariation
, b) cit cincreases chomozygosity
c) cit cviolates cthe cHardy-Weinberg cassumptions
d) cit cdecreases cthe cpopulation's caverage cfitness
e) cit cdoes cnot cchange cthe cpopulation's callele cfrequencies c- cCORRECT cANS✔✔e) cit cdoes cnot
cfrequencies
Why cdo cinbred cpopulations ctypically chave clower cfitness cthan cnon-inbred cpopulations? c
a) cinbreeding ccauses creproductive cisolation
b) cinbreeding cincreases cthe crate cof cgenetic cdrift
c) cinbreeding cincreases cthe cfrequency cof cmutation c
d) cinbreeding ccan cincrease cthe cfrequency cof charmful calleles
e) cinbreeding ccan cincrease cthe cfrequency cof cgenotypes cwith clow cfitness c- cCORRECT cANS✔✔
cthe cfrequency cof cgenotypes cwith clow cfitness
A cpopulation cof cdeer cwas csurveyed cin c2011 cand cagain c2012, cand cthe cgenotypic cfrequencies c
2011- cAA c= c0.49, cAa c= c0.42, caa c= c0.09
2012- cAA c= c0.63, cAa c= c0.14, caa c= c0.23
What cprocess cis cmost clikely cresponsible cfor cthe cobserved cchanges? c
a) callopatry
b) cmutation
c) cinbreeding
d) cgenetic cdrift
e) cnatural cselection c- cCORRECT cANS✔✔c) cinbreeding
Species cexhibit csexual cdimorphism cwhen cthe cmales chave cdifferent cphenotypes cthan cfemales. c
cexplains cwhy ca cspecies cwould cshow csexual cdimorphism c(Assume cthat cphenotypic cdifferences
care cgenetically cdetermined). c
a) callopatry
b) cmutation
c) cgenetic cdrift
d) cnon-random cmating
e) creproductive cisolation c- cCORRECT cANS✔✔d) cnon-random cmating
The cscissor-tailed cflycatcher cis cthe cstate cbird cof cOklahoma. cMales chave cmuch clonger ctail cfeat
cthe clongest ctail cfeathers cmate cearlier cin cthe cbreeding cseason, cand cmore coften. cThe clong ctail
cresult cof: c
a) cgene cflow
b) cinbreeding
c) cgenetic cdrift
d) csexual cselection cby cfemale cchoice
e) csexual cselection cby cmale-male ccompetition c- cCORRECT cANS✔✔d) csexual cselection cby cfem
What cinformation cdo cyou cneed cto cdetermine cif ctwo cmice cfrom cdifferent cpopulations cbelong cto
cbiological cspecies cconcept?
a) cif cthey clive cin cthe csame chabitat
b) cif cthe cwill cmate cwith cone canother
c) cif cthey ccan cproduce cfertile coffspring c
d) cif cthey chave csimilar cphenotypes
