IB 150 Exam 2 Practice Exam Questions
With Correct Answers
Which |of |the |following |is |true |about |both |of |the |following |mutations:
-a |substitution |that |causes |a |nonsense |mutation
-a |three-nucleotide |insertion |mutation |- |CORRECT |ANSWER✔✔-a. |both |change |the |length |of |
the |translated |amino |acid |sequence, |relative |to |the |product |of |the |unmutated |DNA |sequence
Original |mRNA |sequence: |AUGUAUUGGCCU
New |mRNA |sequence: |AUGUAUCGGCCU
|
This |mutation |would |be |classified |as |a |_____________________ |mutation. |- |CORRECT |
ANSWER✔✔-missense
Which |of |the |following |accurately |describes |the |processes |that |can |create |combinations |of |
alleles |of |these |three |genes |that |were |not |present |in |this |individual's |parents? |- |CORRECT |
ANSWER✔✔-crossing |over |but |not |independent |assortment
Recombination |of |alleles |is |caused |by |the |exchange |of |genetic |material |between |
____________. |- |CORRECT |ANSWER✔✔-non-sister |chromatids |of |homologous |chromosomes
Which |of |the |following |diagrams |correctly |labels |the |alleles |of |a |diploid |organism |that |is |
heterozygous |for |three |genes |(A, |B |and |C)? |- |CORRECT |ANSWER✔✔-(heterozygous |alleles |on |
same |gene)
The |human |ABO |blood |group |is |controlled |by |a |single |autosomal |gene |with |three |alleles, |IA, |IB
|and |i. |Individuals |with |either |the |IAIA |or |IAi |genotypes |have |blood |type |A; |those |with |IB |IBor |
, IBi |have |blood |type |B; |those |with |IAIB |have |blood |type |AB; |and |those |with |ii |have |blood |type |
O.
Imagine |a |mother |with |type-A |blood, |and |a |father |with |type-B |blood |have |a |baby |with |type-O |
blood. |What |is |the |probability |that |any |given |child |of |this |couple |will |have |type-O |blood? |- |
CORRECT |ANSWER✔✔-0.250
In |a |species |of |mouse, |there |are |two |alleles |(A1 |and |A2) |of |a |single |gene |that |control |coat |
color. |A1A1 |individuals |have |white |coats, |A1A2 |individuals |have |brown |coats, |and |A2A2 |
individuals |have |black |coats. |A |breeding |pair |of |brown |mice |produce |12 |offspring. |How |many |
of |those |offspring |do |you |expect |to |be |brown? |- |CORRECT |ANSWER✔✔-6
A |species |of |mice |can |have |gray |or |black |fur |and |long |or |short |tails. |Many |crosses |between |
black-furred, |long-tailed |mice |and |gray-furred, |short-tailed |mice |all |produce |black-furred, |long-
tailed |offspring. |How |many |distinct |genotypes |will |be |found |among |the |gametes |of |the |black-
furred, |long-tailed |P1 |mice |(i.e., |the |original |parents)? |- |CORRECT |ANSWER✔✔-1
Imagine |Genes |A |and |B |are |linked |on |one |chromosome |type, |and |Genes |C |and |D |are |linked |on
|another. |For |an |individual |heterozygous |at |all |four |genes |(i.e., |AaBbCcDd), |how |many |distinct |
gamete |genotypes |are |possible |for |this |individual? |(Ignore |mutation |and |crossing-over.) |- |
CORRECT |ANSWER✔✔-4
In |a |plant, |the |allele |that |results |in |violet |flowers |(V) |is |dominant |to |one |that |results |in |white |
flowers |(v); |at |another |locus, |the |allele |that |makes |prickly |seed |capsules |(P) |is |dominant |to |
one |that |results |in |smooth |capsules |(p). |A |plant |with |white |flowers |and |prickly |capsules |is |
crossed |with |one |that |has |violet |flowers |and |smooth |capsules. |The |resulting |seeds |were |
planted |and |yielded |50 |plants |with |white |flowers |and |prickly |capsules, |46 |plants |with |white |
flowers |and |smooth |capsules, |45 |plants |with |violet |flowers |and |prickly |capsules, |and |47 |plants
|with |violet |flowers |and |smooth |capsules. |What |are |the |genotypes |of |the |two |parents? |- |
CORRECT |ANSWER✔✔-vvPp |and |Vvpp
The |pedigree |below |does |not |indicate |carriers. |Assume |that |individuals |not |directly |descended
|from |the |original |two |parents |are |homozygous |dominant. |Using |the |phenotype |information |
With Correct Answers
Which |of |the |following |is |true |about |both |of |the |following |mutations:
-a |substitution |that |causes |a |nonsense |mutation
-a |three-nucleotide |insertion |mutation |- |CORRECT |ANSWER✔✔-a. |both |change |the |length |of |
the |translated |amino |acid |sequence, |relative |to |the |product |of |the |unmutated |DNA |sequence
Original |mRNA |sequence: |AUGUAUUGGCCU
New |mRNA |sequence: |AUGUAUCGGCCU
|
This |mutation |would |be |classified |as |a |_____________________ |mutation. |- |CORRECT |
ANSWER✔✔-missense
Which |of |the |following |accurately |describes |the |processes |that |can |create |combinations |of |
alleles |of |these |three |genes |that |were |not |present |in |this |individual's |parents? |- |CORRECT |
ANSWER✔✔-crossing |over |but |not |independent |assortment
Recombination |of |alleles |is |caused |by |the |exchange |of |genetic |material |between |
____________. |- |CORRECT |ANSWER✔✔-non-sister |chromatids |of |homologous |chromosomes
Which |of |the |following |diagrams |correctly |labels |the |alleles |of |a |diploid |organism |that |is |
heterozygous |for |three |genes |(A, |B |and |C)? |- |CORRECT |ANSWER✔✔-(heterozygous |alleles |on |
same |gene)
The |human |ABO |blood |group |is |controlled |by |a |single |autosomal |gene |with |three |alleles, |IA, |IB
|and |i. |Individuals |with |either |the |IAIA |or |IAi |genotypes |have |blood |type |A; |those |with |IB |IBor |
, IBi |have |blood |type |B; |those |with |IAIB |have |blood |type |AB; |and |those |with |ii |have |blood |type |
O.
Imagine |a |mother |with |type-A |blood, |and |a |father |with |type-B |blood |have |a |baby |with |type-O |
blood. |What |is |the |probability |that |any |given |child |of |this |couple |will |have |type-O |blood? |- |
CORRECT |ANSWER✔✔-0.250
In |a |species |of |mouse, |there |are |two |alleles |(A1 |and |A2) |of |a |single |gene |that |control |coat |
color. |A1A1 |individuals |have |white |coats, |A1A2 |individuals |have |brown |coats, |and |A2A2 |
individuals |have |black |coats. |A |breeding |pair |of |brown |mice |produce |12 |offspring. |How |many |
of |those |offspring |do |you |expect |to |be |brown? |- |CORRECT |ANSWER✔✔-6
A |species |of |mice |can |have |gray |or |black |fur |and |long |or |short |tails. |Many |crosses |between |
black-furred, |long-tailed |mice |and |gray-furred, |short-tailed |mice |all |produce |black-furred, |long-
tailed |offspring. |How |many |distinct |genotypes |will |be |found |among |the |gametes |of |the |black-
furred, |long-tailed |P1 |mice |(i.e., |the |original |parents)? |- |CORRECT |ANSWER✔✔-1
Imagine |Genes |A |and |B |are |linked |on |one |chromosome |type, |and |Genes |C |and |D |are |linked |on
|another. |For |an |individual |heterozygous |at |all |four |genes |(i.e., |AaBbCcDd), |how |many |distinct |
gamete |genotypes |are |possible |for |this |individual? |(Ignore |mutation |and |crossing-over.) |- |
CORRECT |ANSWER✔✔-4
In |a |plant, |the |allele |that |results |in |violet |flowers |(V) |is |dominant |to |one |that |results |in |white |
flowers |(v); |at |another |locus, |the |allele |that |makes |prickly |seed |capsules |(P) |is |dominant |to |
one |that |results |in |smooth |capsules |(p). |A |plant |with |white |flowers |and |prickly |capsules |is |
crossed |with |one |that |has |violet |flowers |and |smooth |capsules. |The |resulting |seeds |were |
planted |and |yielded |50 |plants |with |white |flowers |and |prickly |capsules, |46 |plants |with |white |
flowers |and |smooth |capsules, |45 |plants |with |violet |flowers |and |prickly |capsules, |and |47 |plants
|with |violet |flowers |and |smooth |capsules. |What |are |the |genotypes |of |the |two |parents? |- |
CORRECT |ANSWER✔✔-vvPp |and |Vvpp
The |pedigree |below |does |not |indicate |carriers. |Assume |that |individuals |not |directly |descended
|from |the |original |two |parents |are |homozygous |dominant. |Using |the |phenotype |information |
