Bio 230 EXAM 2 QUESTIONS WITH
CORRECT ANSWERS
Which |of |the |following |is |most |accurate |about |DNA |replication |and |transcription/translation |
(central |dogma/gene |expression)? |- |CORRECT |ANSWER✔✔-DNA |replication |occurs |in |some |
cells, |while |transcription/translation |occurs |in |virtually |all |cells.
A |liver |cell |has |an |aflatoxin |DNA |adduct |- |a |chemical |attached |to |a |nucleotide |in |the |DNA, |
which |causes |a |mistake |(mutation) |during |DNA |replication |(copying).
After |four |cell |divisions |- |resulting |in |16 |cells |- |how |many |of |the |cells |will |have |the |DNA |
ADDUCT? |- |CORRECT |ANSWER✔✔-1 |cell
A |liver |cell |has |an |aflatoxin |DNA |adduct |- |a |chemical |attached |to |a |nucleotide |in |the |DNA, |
which |causes |a |mistake |(mutation) |during |DNA |replication |(copying).
After |four |cell |divisions |- |resulting |in |16 |cells |- |how |many |of |the |cells |will |have |a |MUTATION |in
|the |DNA |sequence? |- |CORRECT |ANSWER✔✔-8 |cells
Your |Aunt |has |been |diagnosed |with |breast |cancer, |and |her |breast |cancer |gene |mutation |
appears |to |be |a |sporadic |(newly |acquired) |mutation |in |one |of |her |breast |cells.
What |are |the |chances |she |will |pass |this |mutation |to |her |children? |- |CORRECT |ANSWER✔✔-0%
Your |Aunt |has |been |diagnosed |with |breast |cancer, |and |her |breast |cancer |gene |mutation |
appears |to |be |an |inherited |mutation |from |one |of |her |parents |since |the |mutation |is |found |in |
all |of |the |cells |in |her |body.
What |are |the |chances |she |will |pass |this |mutation |to |her |children? |- |CORRECT |ANSWER✔✔-
50%
, There |is |a |gene |located |on |Chromosome |2 |in |humans |for |which |4 |different |alleles |(versions) |
have |been |identified.
The |maximum |number |of |different |alleles |a |typical |human |could |have |in |the |nucleus |of |their |
cells |is: |- |CORRECT |ANSWER✔✔-. |2 |alleles
A |slot |machine |has |10 |slots. |Each |slot |has |4 |different |fruits |on |the |spinner |(apple, |pear, |grape, |
and |cherry). |What |are |the |odds |of |getting |a |cherry |in |BOTH |the |first |AND |the |second |slots? |- |
CORRECT |ANSWER✔✔-1/16
You |have |23 |pairs |of |chromosomes |in |your |somatic |(body) |cells. |Each |homologous |pair |is |
comprised |of |one |chromosome |from |your |mother |and |one |from |your |father.
What |are |the |chances |of |making |a |gamete |(sperm |cell |or |egg |cell) |in |which |all |of |the |
chromosomes |are |from |your |mother?
(Assume |that |there |is |no |meiotic |crossing-over.) |- |CORRECT |ANSWER✔✔-(1/2)23
Two |sets |of |genetically |identical |twins |- |two |identical |brothers |and |two |identical |sisters |- |
happen |to |meet |and |fall |in |love.
Each |couple |has |one |child.
Assuming |that |there |are |no |new |mutations |and |that |there |is |no |meiotic |crossover...
What |are |the |chances |that |these |two |children |will |be |genetically |identical? |- |CORRECT |
ANSWER✔✔-Really |really |small
Two |sets |of |genetically |identical |twins |- |two |identical |brothers |and |two |identical |sisters |- |
happen |to |meet |and |fall |in |love.
Each |couple |has |one |child.
Assuming |that |there |are |no |new |mutations |and |that |there |is |no |meiotic |crossover...
What |are |the |chances |that |these |two |children |will |be |genetically |identical? |- |CORRECT |
ANSWER✔✔-(1/2)92 |(= |1/5 |x |1027)
CORRECT ANSWERS
Which |of |the |following |is |most |accurate |about |DNA |replication |and |transcription/translation |
(central |dogma/gene |expression)? |- |CORRECT |ANSWER✔✔-DNA |replication |occurs |in |some |
cells, |while |transcription/translation |occurs |in |virtually |all |cells.
A |liver |cell |has |an |aflatoxin |DNA |adduct |- |a |chemical |attached |to |a |nucleotide |in |the |DNA, |
which |causes |a |mistake |(mutation) |during |DNA |replication |(copying).
After |four |cell |divisions |- |resulting |in |16 |cells |- |how |many |of |the |cells |will |have |the |DNA |
ADDUCT? |- |CORRECT |ANSWER✔✔-1 |cell
A |liver |cell |has |an |aflatoxin |DNA |adduct |- |a |chemical |attached |to |a |nucleotide |in |the |DNA, |
which |causes |a |mistake |(mutation) |during |DNA |replication |(copying).
After |four |cell |divisions |- |resulting |in |16 |cells |- |how |many |of |the |cells |will |have |a |MUTATION |in
|the |DNA |sequence? |- |CORRECT |ANSWER✔✔-8 |cells
Your |Aunt |has |been |diagnosed |with |breast |cancer, |and |her |breast |cancer |gene |mutation |
appears |to |be |a |sporadic |(newly |acquired) |mutation |in |one |of |her |breast |cells.
What |are |the |chances |she |will |pass |this |mutation |to |her |children? |- |CORRECT |ANSWER✔✔-0%
Your |Aunt |has |been |diagnosed |with |breast |cancer, |and |her |breast |cancer |gene |mutation |
appears |to |be |an |inherited |mutation |from |one |of |her |parents |since |the |mutation |is |found |in |
all |of |the |cells |in |her |body.
What |are |the |chances |she |will |pass |this |mutation |to |her |children? |- |CORRECT |ANSWER✔✔-
50%
, There |is |a |gene |located |on |Chromosome |2 |in |humans |for |which |4 |different |alleles |(versions) |
have |been |identified.
The |maximum |number |of |different |alleles |a |typical |human |could |have |in |the |nucleus |of |their |
cells |is: |- |CORRECT |ANSWER✔✔-. |2 |alleles
A |slot |machine |has |10 |slots. |Each |slot |has |4 |different |fruits |on |the |spinner |(apple, |pear, |grape, |
and |cherry). |What |are |the |odds |of |getting |a |cherry |in |BOTH |the |first |AND |the |second |slots? |- |
CORRECT |ANSWER✔✔-1/16
You |have |23 |pairs |of |chromosomes |in |your |somatic |(body) |cells. |Each |homologous |pair |is |
comprised |of |one |chromosome |from |your |mother |and |one |from |your |father.
What |are |the |chances |of |making |a |gamete |(sperm |cell |or |egg |cell) |in |which |all |of |the |
chromosomes |are |from |your |mother?
(Assume |that |there |is |no |meiotic |crossing-over.) |- |CORRECT |ANSWER✔✔-(1/2)23
Two |sets |of |genetically |identical |twins |- |two |identical |brothers |and |two |identical |sisters |- |
happen |to |meet |and |fall |in |love.
Each |couple |has |one |child.
Assuming |that |there |are |no |new |mutations |and |that |there |is |no |meiotic |crossover...
What |are |the |chances |that |these |two |children |will |be |genetically |identical? |- |CORRECT |
ANSWER✔✔-Really |really |small
Two |sets |of |genetically |identical |twins |- |two |identical |brothers |and |two |identical |sisters |- |
happen |to |meet |and |fall |in |love.
Each |couple |has |one |child.
Assuming |that |there |are |no |new |mutations |and |that |there |is |no |meiotic |crossover...
What |are |the |chances |that |these |two |children |will |be |genetically |identical? |- |CORRECT |
ANSWER✔✔-(1/2)92 |(= |1/5 |x |1027)
