BIO 202 PRACTICE EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS
A bird species can display a fake injury to distract a
predator's attention from other individuals nearby but in
doing so puts itself at a greater risk of being caught. If the
bird decreases the chances of sibling being killed by 20%
but increases risk to itself by 5 %, which expression below
regarding kin selection is accurate?
-B<C/r, trait will not evolve
-B>C/r, trait will evolve
-B=C/r, trait is neutral
-kin selection only favors traits that aid descendant kin
-there is no inclusive fitness benefits so the trait cannot
evolve - correct answer- B>C/r, trait will evolve
A point mutation is found at a low frequency in a
population of bison (.1) with a small effective population
size and this point mutation does not change the amino
acid encoded by the protein produced from this gene.
Which of the following statements is correct given this
information:
, -there is a 90 percent chance that this mutation will be
lost from the population given enough time
-this mutation is likely to be strongly deleterious and lost
quickly due to selection
-there is a 10 percent chance that this mutation will be
lost eventually
-the mutation should be maintained in the population
because populations with more genetic variation can
survive in changing environments better
-the allele frequency will stay at a frequency of .1 be it is
selectively neutral - correct answer- there is a
90 percent chance that this mutation will be lost from the
population given enough time
A population of morning glories has a recessive allele (w)
that results in white flowers when homozygous, while a
second dominant allele (W) results in purple flowers. If
the phenotypic frequency of the purple flowers (WW and
Ww) is .8, what us the allele frequency of the w allele in
this population assuming HWE? - correct answer-
.45
(q^2=f(ww)=.2 q=f(w)=sqrt/(.2)=.45)
WITH DETAILED VERIFIED ANSWERS
A bird species can display a fake injury to distract a
predator's attention from other individuals nearby but in
doing so puts itself at a greater risk of being caught. If the
bird decreases the chances of sibling being killed by 20%
but increases risk to itself by 5 %, which expression below
regarding kin selection is accurate?
-B<C/r, trait will not evolve
-B>C/r, trait will evolve
-B=C/r, trait is neutral
-kin selection only favors traits that aid descendant kin
-there is no inclusive fitness benefits so the trait cannot
evolve - correct answer- B>C/r, trait will evolve
A point mutation is found at a low frequency in a
population of bison (.1) with a small effective population
size and this point mutation does not change the amino
acid encoded by the protein produced from this gene.
Which of the following statements is correct given this
information:
, -there is a 90 percent chance that this mutation will be
lost from the population given enough time
-this mutation is likely to be strongly deleterious and lost
quickly due to selection
-there is a 10 percent chance that this mutation will be
lost eventually
-the mutation should be maintained in the population
because populations with more genetic variation can
survive in changing environments better
-the allele frequency will stay at a frequency of .1 be it is
selectively neutral - correct answer- there is a
90 percent chance that this mutation will be lost from the
population given enough time
A population of morning glories has a recessive allele (w)
that results in white flowers when homozygous, while a
second dominant allele (W) results in purple flowers. If
the phenotypic frequency of the purple flowers (WW and
Ww) is .8, what us the allele frequency of the w allele in
this population assuming HWE? - correct answer-
.45
(q^2=f(ww)=.2 q=f(w)=sqrt/(.2)=.45)
