IB 150 FINAL EXAM (3&4) PRACTICE QUESTIONS AND CORRECT ANSWERS

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 |c
|cnew |calleles |cto |ca |cpopulation |c(consider |c"new" |cto |cbe |cany |callele |cthat |cdid |cnot |cpreviously |cexist |ci




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 |c
|cmeasurable |cdeviation |cfrom |cHardy-Weinberg |cequilibrium |cin |conly |cone |cgeneration? |c(Assume |ca |

|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 |cmo

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

, a) |cit |climits |cgene |cflow
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 |cno
|callele |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

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.
|cexplains |cwhy |ca |cspecies |cwould |cshow |csexual |cdimorphism |c(Assume |cthat |cphenotypic |cdifference

|cfemales |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 |cfea
|cwith |cthe |clongest |ctail |cfeathers |cmate |cearlier |cin |cthe |cbreeding |cseason, |cand |cmore |coften. |cThe |clo

|clikely |ca |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 |cfe

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