PCB 3063 Previous exam questions with
complete solutions
All eukaryotes are diploid for the largest proportion
of their life cycle
False. Fungi are haploid for most of their life
Homologous pairs of chromosomes separate from
each other during
Meiosis I
If a species has a life cycle that includes sexual
reproduction, that species mustinclude both male
and female individuals
False. Fungi do not have sexes
A dividing eukaryotic cell is treated with a drug
that inhibits the molecularmotors associated with
kinetochores (proteins that attach spindle
microtubulesto the centromere of dividing cells and
help move chromosomes to oppositepoles of the
dividing cell). At which cell cycle stage would it
stop?
Metaphase. It cannot make it to anaphase if
spindles can not be attached.
What might be the result if the breakdown of the
shugoshin protein werepremature?
, sister chromatid separation would be
premature(happen in meiosis I instead of meiosis II
Which of the following theories of inheritance is
consistent with all currentlyavailable data and
applicable to our current understanding of genetics
andinheritance?
Cell theory, germplasm theory, chromosome
theory of inheritance.
In some life cycles, haploid cells go through
mitosis.
True (occurs mostly in plants during
gametogenesis)
During some phases of the cell division cycle,
chromosomes contain sisterchromatids which
remain joined at the centromere at the end of
Metaphase, metaphase I, and metaphase II
The cross of CcDd × CcDd results in a 12:3:1
phenotypic ratio. What is theexpected phenotypic
ratio when a CcDd × ccdd testcross is made
involving thesame two genes? (They are assorting
independently.)
12 CoDo 3 ccDd 1 ccdd
The phenotypic ratio of progeny from ____ crosses
will definitively reveal if traits are exhibiting ____
complete solutions
All eukaryotes are diploid for the largest proportion
of their life cycle
False. Fungi are haploid for most of their life
Homologous pairs of chromosomes separate from
each other during
Meiosis I
If a species has a life cycle that includes sexual
reproduction, that species mustinclude both male
and female individuals
False. Fungi do not have sexes
A dividing eukaryotic cell is treated with a drug
that inhibits the molecularmotors associated with
kinetochores (proteins that attach spindle
microtubulesto the centromere of dividing cells and
help move chromosomes to oppositepoles of the
dividing cell). At which cell cycle stage would it
stop?
Metaphase. It cannot make it to anaphase if
spindles can not be attached.
What might be the result if the breakdown of the
shugoshin protein werepremature?
, sister chromatid separation would be
premature(happen in meiosis I instead of meiosis II
Which of the following theories of inheritance is
consistent with all currentlyavailable data and
applicable to our current understanding of genetics
andinheritance?
Cell theory, germplasm theory, chromosome
theory of inheritance.
In some life cycles, haploid cells go through
mitosis.
True (occurs mostly in plants during
gametogenesis)
During some phases of the cell division cycle,
chromosomes contain sisterchromatids which
remain joined at the centromere at the end of
Metaphase, metaphase I, and metaphase II
The cross of CcDd × CcDd results in a 12:3:1
phenotypic ratio. What is theexpected phenotypic
ratio when a CcDd × ccdd testcross is made
involving thesame two genes? (They are assorting
independently.)
12 CoDo 3 ccDd 1 ccdd
The phenotypic ratio of progeny from ____ crosses
will definitively reveal if traits are exhibiting ____
