Question for 1-4 discussion (KEY)

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Unformatted text preview: Question
for
1ST
discussion

 
 1. What
is
the
most
important
difference
between
meiosis
and
mitosis?
 a. Meiosis
is
faster
than
mitosis.
 b. Meiosis
produces
different
varieties
of
cells,
whereas
mitosis
produces
 identical
daughter
cells.
 c. Meiosis
occurs
only
in
somatic
cells
and
mitosis
occurs
in
gametic
cells.
 d. Both
a
and
b
 e. Both
b
and
c
 
 
 2. During
meiosis,
sister
chromatids
separate
during

 a. anaphase
I
 b. anaphase
II
 c. S
phase
 d. Synapsis
 e. Telophase
II
 
 3. Which
statement
about
asexual
reproduction
is
true?
 a. In
asexual
reproduction,
a
cell
is
divided
by
a
furrowing
of
plasma
 membrane.
 b. Asexual
reproduction
necessarily
involves
meiosis.
 c. In
asexual
reproduction,
there
is
genetic
variation
among
the
offspring.
 d. In
asexual
reproduction,
two
gametes
fuse
to
produce
a
zygote.
 e. Asexual
reproduction
produces
a
clone
of
offspring
that
are
genetically
 identical
to
the
parent.
 
 4. In
meiosis,
 a. a
single
nucleus
gives
rise
to
two
daughter
nuclei.
 b. the
daughter
nuclei
are
genetically
identical
to
the
parent
nucleus.
 c. the
centromeres
separate
at
the
onset
of
anaphase
I.
 d. homologous
chromosomes
synapse
in
prophase
I.
 e. no
spindle
forms.
 
 5. Which
of
the
following
is
not
true
of
homologous
chromosome
pairs?
 a. They
come
from
only
one
of
the
individual’s
parents.
 b. They
usually
contain
slightly
different
versions
of
the
same
genetic
 information.
 c. They
segregate
from
each
other
during
meiosis
I.
 d. They
synapse
during
meiosis
I.
 e. Each
contains
two
sister
chromatids
at
the
beginning
of
meiosis
I.
 
 6. Different
forms
of
a
gene
are
called
 a. traits.
 b. phenotypes.
 c. genotypes.
 
 d. alleles.
 e. None
of
the
above.
 7. It
has
been
found
that
at
a
certain
locus
of
the
human
genome,
200
different
 alleles
exist
in
the
population.
Each
person
has
at
most
________
alleles.
 a.


1





b.




2






c.




100





d.

200







e.



400




 
 






8.

In
mice,
short
hair
is
dominant
to
long
hair.
If
a
short‐haired
individual
is



 













crossed
with
a
long‐haired
individual
and
both
long‐
and
short‐haired

 













offspring
result,
you
can
conclude
that
 a. The
short‐haired
individual
is
homozygous.
 b. The
short‐haired
individual
is
heterozygous.
 c. The
long‐haired
individual
is
homozygous.
 d. The
long‐haired
individual
is
heterozygous.
 e. This
cannot
be
answered
without
more
information.
 
 For
short
answer
questions,
give
concise,
intelligible
answers;
complete
sentences
 are
not
necessary.
 
 Matching:
Each
choice
may
be
used
more
than
once.
 
 A. Genotype(4)




























1.
An
individual
having
two
identical
alleles
at
a

 





















































particular
locus.
 B. Incomplete
dominance








2.
The
outward
physical
appearance
of
an
individual.

 C. Heterozygote(5)




















3.
The
dominant
appearance
of
Bb
individual
 D. Homozygote(1)






















4.
The
entire
genetic
constitution
of
an
individual
 E. Phenotype(2)(3)




















5.
The
Bb
individual.
 
 The
following
diagrams
depict
cells
from
the
same
organism
at
various
stages
of
 mitosis
or
meiosis:
 Which
of
the
diagrams
above
depicts
a
cell
in
prophase
of
mitosis?___A____
 



How
many
chromosomes
are
there
in
this
cell?___4____
 Which
of
the
diagrams
above
depicts
a
cell
at
the
end
of
mitosis?___B____
 



How
many
chromosomes
are
there
in
this
cell?___4_____
 



Are
the
chromosomes
in
this
cell
identical
to
or
different
from
the
chromosomes

 





in
the
cell
that
divided
to
produce
it?___identical
to______
 Which
of
the
diagrams
above
depicts
a
cell
in
prophase
of
meiosis
1?__D_____
 



How
many
chromosomes
are
there
in
this
cell?___4____
 
 Which
of
the
diagrams
above
depicts
a
cell
at
the
end
of
meiosis
1?___C____
 



How
many
chromosomes
are
there
in
this
cell?___2____
 Which
of
the
diagrams
above
depicts
a
cell
at
the
end
of
meiosis
2?___E____
 



How
many
chromosomes
are
there
in
this
cell?___2____
 



Are
the
chromosomes
in
this
cell
identical
to
or
different
from
the
chromosomes

 





in
the
cell
that
divided
to
produce
it?__different
from_____
 Which
of
the
diagrams
above
depicts
a
cell
in
which
crossing‐over
could
 occur?___D____
 
 1.
Which
of
the
following
happens
at
the
conclusion
of
meiosis
1?
 a.
The
sperm
cells
elongate
to
form
a
head
and
a
tail
end.
 b.
Four
daughter
cells
are
formed.
 c.
Sister
chromatids
are
separated.
 d.
Homologous
chromosomes
are
separated.
 e.
none
of
the
above.
 
 2.
Which
of
the
following
statements
is
FLASE?
 a.
Individuals
with
the
same
phenotype
might
have
different
genotypes.
 b.
Matings
between
individuals
with
dominant
phenotypes
cannot
produce
offspring
 with
recessive
phenotypes.
 c.
Mating
between
individuals
with
recessive
phenotypes
usually
do
not
produce
 offspring
with
dominant
phenotypes.
 d.
Individuals
with
the
same
genotype
might
have
different
phenotypes.
 e.
Individual’s
phenotype
may
be
caused
by
incomplete
dominance.
 
 3.
Asexual
reproduction
results
in
identical
offspring
unless
which
of
the
following
 occurs?
 a.
Natural
selection
 b.
Random
segregation
 c.
Crossing
over.
 d.
Mutation
 e.
Environmental
change
 
 4.
Which
of
the
following
is
true
of
a
species
that
has
a
chromosome
number
of
 2n=16?
 a.
The
species
is
diploid
with
32
chromosomes
per
cell.
 b.
The
species
has
16
sets
of
chromosomes
per
cell.
 c.
The
species
has
8
homologous
pairs.
 d.
A
gamete
from
this
species
has
4
chromosomes.
 e.
During
the
interphase
there
will
be
32
separate
chromosomes.
 
 5.
A
tetrad
includes
which
of
the
following
sets
of
DNA
strands?
 a.
Two
single‐stranded
chromosomes
that
have
synapsed.
 b.
Two
sets
of
sister
chromatids
that
have
synapsed.
 c.
Four
sets
of
sister
chromatids.
 d.
Four
sets
of
unique
chromosomes.
 e.
Eight
sets
of
sister
chromatids.
 
 6.
Skin
color
in
a
certain
species
of
fish
is
inherited
via
a
single
gene
with
four
 different
alleles.
How
many
different
types
of
gametes
would
be
possible
in
this
 system?
 a.
1
 b.
2
 c.
4
 d.
8
 e.
16
 
 Match
each
term
on
the
left
with
a
statement
on
the
right.
 
 1)
Gene

(G)































A)
A
variant
for
a
character
 
 2)
Allele

(E)





























B)
The
genetic
makeup
of
an
individual.
 
 3)
Trait

(A)































C)
Having
two
identical
alleles
for
a
gene
 
 4)
Heterozygous

(D)














D)
Having
two
different
alleles
for
a
gene
 
 5)
Recessive
allele

(H)











E)
An
alternative
version
of
a
gene
 
 6)
Genotype

(B)























F)
An
organism’s
appearance
or
observable
traits.
 
 7)
Phenotype

(F)





















G)
A
heritable
unit
that
determines
a
character
and
can

 























































exist
in
different
forms.
 8)
Homozygous

(C)
















 






















































H)
Has
no
effect
on
phenotype
in
a
heterozygous.
 
 Define:
 Synapsis
 The
pairing
of
replicated
homologous
chromosomes
during
prophase
I
of
meiosis.
 Fill
in
blank
 
 Mitosis
 Meiosis
I
 Meiosis
II
 Is
the
starting
 parent
cell
diploid
 or
haploid?
 Are
the
daughter
 cells
diploid
or
 haploid?
 Are
the
daughter
 cells
genetically
 identical
to
the
 parent?
 Diploid
 Diploid
 Haploid
 Diploid
 Haploid
(but
with
 replicated
 chromosomes)
 No
 Haploid
 Yes
 No
 
 Each
cell
contains
two
chromosomes
with
genes
fro
the
same
traits
called
 _Homologous
pairs_.
 
 Question
for
2ND
discussion
 
 8. In
Mendel’s
experiments,
if
the
allele
for
tall
(T)
plants
was
incompletely
 dominant
over
the
allele
for
short
(t)
plants,
what
offspring
would
have
 resulted
from
crossing
two
Tt
plants?
 a. ¼
tall;
½
intermediate
height;
¼
short
 b. ½
tall;
¼
intermediate
height;
¼
short
 c. ¼
tall;
¼
intermediate
height;
½
short
 d. All
the
offspring
would
have
been
tall
 e. All
the
offspring
would
have
been
of
intermediate
height
 
 






2.
Cleft
chin
is
a
sex‐linked
dominant
trait.
A
man
with
a
cheft
chin
marries
a

 










woman
with
a
round
chin.
What
percent
of
their
female
progeny
will
show

 










the
cleft
chin
trait?
 a.
0
 b.
25%
 c.
50%
 d.
75%
 e.
100%
 
 





3.
In
mice,
short
hair
is
dominant
to
long
hair.
If
a
short‐haired
individual
is



 













crossed
with
a
long‐haired
individual
and
both
long‐
and
short‐haired

 













offspring
result,
you
can
conclude
that
 f. The
short‐haired
individual
is
homozygous.
 g. The
short‐haired
individual
is
heterozygous.
 h. The
long‐haired
individual
is
homozygous.
 i. The
long‐haired
individual
is
heterozygous.
 j. This
cannot
be
answered
without
more
information.
 
 





4.
In
dogs,
erect
ears
and
barking
while
following
a
scent
are
due
to
dominant

 






alleles;
droopy
ears
and
silence
while
following
a
scent
are
due
to
recessive


 






alleles.
A
dog
homozygous
for
both
traits
is
mated
to
droopy‐eared,
silent

 






follower.
If
the
two
genes
are
on
different
chromosomes,
the
expected
F1

 






phenotypic
ratios
should
be

 






a.
9:3:3:1
 






b.
1:1
 






c.
16:0
 






d.
1:2:1

 






e.
None
of
the
above
 
 




5.
The
ABO
blood
groups
in
humans
are
determined
by
a
multiple
allelic
system
in

 








which
IA
and
IB
are
codominant
and
are
dominant
to
i.
If
an
infant
born
to
a
type

 








O
mother
also
is
type
O,
possible
genotypes
for
the
father
are
 








a.
O
or
A.
 








b.
A
or
B
 








c.
O
only
 










d.
O,
A,
or
B
 










e.
Impossible
to
determine.
 
 1.
A
cross
between
homozygous
purple‐flowered
and
homozygous
white‐flowered
 pea
plants
results
in
offspring
with
purple
flowers.
This
demonstrates

 a.
polygenic
inheritance.
 b.
true‐breeding
 c.
dominance
 d.
a
dihybrid
cross
 e.
the
mistakes
made
by
Mendel.
 
 2.
A
man
has
extra
digits
(six
fingers
on
hand
/
six
toes
on
foot).
His
wife
and
their
 daughter
have
a
normal
number
of
digits.
Having
extra
digits
is
a
dominant
trait.
 The
couple’s
second
child
has
extra
digits.
What
is
the
probability
that
their
next
 child
will
have
extra
digits?
 a.
½
 b.
¼
 c.
1/8
 d.
¾
 e.
9/16
 
 
 Question
for
3RD
discussion
 
 
 9. In
prophase
I
of
meiosis,
the
number
of
chromatids
in
a
cell
of
a
person
with
 Turner’s
syndrome
(XO)
is

 a. 23
 b. 45
 c. 180
 d. 90
 e. 92
 
 10. A
person
with
speck
syndrome
has
how
many
sex
chromosomes
in
each
of
 his
body
cells?
 a. 23






b.

1






c.

2







d.
3








e.
24


 
 
 11.
Cleft
chin
is
a
sex‐linked
dominant
trait.
A
man
with
a
cheft
chin
marries
a

 













woman
with
a
round
chin.
What
percent
of
their
female
progeny
will
show

 













the
cleft
chin
trait?
 a.
0
 b.
25%
 c.
50%
 d.
75%
 e.
100%
 
 15.
A
man
who
carries
an
Y‐linked
allele
will
pass
it
on
to

 a.
All
of
his
children.
 b.
Half
of
his
daughters.
 c.
All
of
his
sons.
 d.
Half
of
his
sons.
 e.
All
of
his
daughters.
 
 Define:
 Pleiotropy
 The
ability
of
a
single
gene
to
have
multiple
effects.
 5. Thalasemia is a very serious disorder affecting the hemoglobin that is caused by an autosomal recessive gene. If both woman and man don’t have the condition but carry the gene, what is the chance of their having a child with the disease? a. 100% b. 75% c. 50% d. 25% e. 0% 7. A man who carries an X-linked allele will pass it on to a. all of his children. b. half of his daughters. c. all of his sons. d. half of his sons. e. all of his daughters. 16. SRY is best described in which of the following ways? a. Gene region present on the Y chromosome that triggers male development. b. A gene present on the X chromosome that triggers female development. c. An autosomal gene that is required for the Y chromosome development. d. An autosomal gene that is required for the X chromosome development. e. A dominant gene, lacking the gene will not survive past early childhood. 17. The diploid chromosome number of a person with Turner’s syndrome is 45; how many chromosomes are likely to be in her gametes? a. 47 b. 22.5 c. 46 d. 22 or 23 e. none of these Refer to the following information to answer the question 18 and 19. A man who is an achondroplastic dwarf with normal vision marries a color-blind woman of normal height. The man’s father was six feet tall, and both the woman’s parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green blindness is X-linked recessive. 18. How many of their daughters might be expected to be color-blind dwarfs? a. All. b. None. c. Half. d. One out of four. e. Three out of four. 19. They have a daughter who is a dwarf with normal color vision. What is the probability that she is heterozygous for both genes? a. 0 b. 25% c. 50% d. 75% e. 100% 20. IF a human interphase nucleus contains two Barr bodies, it can be assumed that the person a. has hemophilia. b. is a male. c. has three X chromosomes. d. has Down syndrome. e. is a triploidy. 27. Huntington’s disease is a dominant condition with late age of onset in humans. If one parent has the disease, what is the probability that his or her child will have the disease? a. 1 b. ¾ c. ½ d. ¼ e. 0 30. Cystic fibrosis (CF) is a Medelian disorder in the human population that is inherited as a recessive. Two normal parents have two children with CF. The probability of their child being normal for this characteristic is which of the following? a. 1/8 b. ¾ c. ½ d. ¼ e. 0 fill in blank. 9) Aneuploidy is a general term that describes gametes or cells with too many or tow few chromosomes compared with the normal number. 5) The Sex chromosomes are the 23rd pair of chromosomes (human) that determine gender. 4) The Autosomes are the 22 pairs of chromosomes not including the X and Y chromosomes. 
 Question
for
4TH
discussion
 
 12.
Which
of
the
following
forms
is
the
correct
way
to
write
the
name
given
to

 















the
domestic
cat
in
the
binomial
system
of
nomenclature?
 a. Felis
domestica
 b. Felis
Domestica
 c. felis
domestica
 d. Felis
domestica
 e. felis
domestica
 
 17.
________
is
the
effect
produced
when
a
bee
carries
pollen
from
one
population
to
 another.
 a.
Gene
flow
 b.
A
population
bottleneck
 c.
Genetic
drift
 d.
Genetic
equilibrium
 e.
Non‐random
mating
 
 18.
________
selection
occurs
when
the
extremes
of
a
population
contribute
relatively
 few
offspring
to
the
next
generation
as
compared
to
average
members
of
the
 population.
 a.
Corrective
 b.
Directional
 c.
Stabilizing
 d.
Disruptive
 e.
Natural
 
 19.
Selection
acts
on
______
variation;
however,
evolution
depends
on
______
variation.
 a.
phenotypic;
genetic
 b.
genetic;
phenotypic

 c.
genetic;
environmentally‐induced
 d.
environmentally‐induced;
phenotypic
 e.
environmentally‐induced;
genetic
 
 20.
A
gene
pool
consists
of
all
the
alleles
 a.
of
an
individual’s
genotype.
 b.
present
in
a
specific
population.
 c.
that
occur
in
a
species
throughout
its
evolutionary
existence.
 d.
that
contribute
to
the
next
generation
of
a
population.
 e.
of
a
biome.
 
 21.
A
mutation
occurs
inone
of
your
lung
cells.
Which
of
following
is
true?
 a.
You
have
evolved
to
be
better
adapted
to
your
environment.
 b.
You
will
soon
die
because
most
mutations
are
lethal.
 c.
You
will
be
sterile
and
no
longer
be
able
to
have
children.
 d.
The
human
species
will
have
evolved
because
this
mutation
will
be
passed
on
to
 your
children.
 e.
This
mutation
does
not
affect
human
evolution
because
it
will
not
be
passed
on
to
 your
offspring.
 
 22.
Natural
selection
acts
directly
on
the

 a.
genotype
to
produce
new
mutations.
 b.
phenotype
to
produce
new
muations.
 c.
genotype
to
favor
existing
mutations.
 d.
phenotype
to
favor
traits
due
to
existing
mutations.
 e.
genotype
to
inhibit
new
mutations.
 
 23.
Species
that
are
in
the
same
_________

are
more
closely
related
than
species
that
 are
only
in
the
same
________.
 a.
class

…

order
 b.
kingdom

...

phylum
 c.
family

…

order
 d.
phylum

…

class
 e.
family

…

genus
 
 24.
Which
of
the
following
factors
probably
was
not
important
in
the
formation
of
 the
many
species
of
Darwin’s
finches
on
the
Galapagos
Islands?
 a.
Geographical
isolation
from
the
mainland
 b.
Polyploidy
 c.
Different
habitats
on
the
different
islands
 d.
Geographical
isolation
of
one
island
from
another
 e.
Different
food
supplies
on
the
different
islands
 
 25.
Which
of
the
following
is
a
prezygotic
isolation
mechanism?
 a.
Abnormal
meiosis
following
fertilization
 b.
Infertile
hybrids
 c.
Reduced
viability
of
hybrids
 d.
Abnormal
mitosis
following
fertilization
 e.
Variation
in
mating
pheromones
 
 26.
The
modern
polar
bear
species
evolved
from
ancestral
bear
populations
in
 southern
Alaska
that
became
separated
by
glaciers
from
bear
populations
in
the
rest
 of
North
America.
This
type
of
event
is
called

 a.
allopatric
speciation.
 b.
temporal
isolation.
 c.
mechanical
isolation.
 d.
sympatric
speciation.
 e.
None
of
the
above.
 27.
Six
platyfish
with
different
tail
spotting
patterns
live
is
eastern
Mexico.
Five
of
 them
can
interbreed
and
produce
fertile
offspring.
One
of
them
cannot
interbreed
 with
the
other
five.
What
can
you
conclude
about
these
platyfish?
 a.
They
all
belong
to
the
same
biological
species.
 b.
They
each
are
a
different
biological
species.
 c.
There
are
two
biological
species
in
the
example
above.
 d.
There
is
not
enough
data
given
to
draw
a
conclusion.
 e.
There
are
six
biological
species
in
the
example
above.
 
 28.
Which
of
the
following
is
not
true
about
prezygotic
reproductive
barriers?
 a.
Sperm
of
one
species
may
not
attach
to
the
egg
of
another
species
because
the
 eggs
do
not
release
the
appropriate
chemicals.
 b.
Individuals
of
a
species
may
reject
individuals
of
other
species
as
mating
partners.
 c.
Differences
in
sizes
and
shapes
of
reproductive
organs
may
prevent
the
union
of
 gametes
from
different
species.
 d.
Organisms
have
mating
periods
that
are
as
long
as
few
days
or
weeks.
 e.
Individuals
of
different
species
may
select
different
places
in
the
environment
in
 which
to
live.
 
 29.
Reptiles
dominated
the
:
 a.
Proterozoic
era.
 b.
Paleozoic
era.
 c.
Mesozoic
era.
 d.
Cenozoic
era.
 e.
Triassic
era.
 
 30.
A
genus
is
a

 a.
group
of
closely
related
species.
 b.
group
of
genera.
 c.
group
of
similar
genotypes.
 d.
taxonomic
unit
larger
than
a
family.
 e.
taxonomic
unit
smaller
than
a
species.
 
 31.
Which
of
the
following
is
not
a
way
in
which
phylogenies
are
used?
 a.
To
establish
evolutionary
relationships.
 b.
To
determine
how
rapidly
traits
evolve.
 c.
To
determine
historical
patterns
of
movement
of
organisms.
 d.
To
provide
relatively
stable
names
for
organisms.
 e.
To
infer
evolutionary
trends.
 
 
 Exam1
Figure1
 
 
 32.
(refer
the
Exam1
Figure1)
The
organism
labeled
B
in
the
figure
is
a
common
 ancestor
to:
 a.
organism
2.
 b.
organism
3.
 c.
organism
5.
 d.
organism
6.
 e.
All
of
the
above.
 
 33.
(refer
the
Exam1
Figure1)
 a.
organism
2,
3,
B,
5,
and
6
from
a
clade.
 b.
organism
2,
3,
C,
5,
6,
and
E
form
a
clade.
 c.
organism
4,
5,
6,
E,
D,
and
B
form
a
clade.
 d.
organism
2,
3,
C,
B,
D,
4,
5,
6,
from
a
clade.
 e.
organism
4,
5,
D,
E,
and
6
from
a
clade.
 
 (2.5pts)
What
are
the
five
conditions
that
must
be
met
for
a
population
to
be
in
 Hardy‐Weinberg
equilibrium.
 1.
No
mutation
 2.
Large
population
(no
genetic
drift)
 3.
Isolated
from
other
populations
(no
gene
flow)
 4.
Random
mating
 5.
no
selection
 
 Define:
Phylogeny
 The
evolutionary
history
of
a
species
or
group
of
related
species.
 
 1. The
correct
sequence,
from
the
most
to
the
least
comprehensive,
of
the
 taxonomic
levels
listed
here
is

 a. Family,
phylum,
class,
kingdom,
order,
species,
and
genus.
 b. Kingdom,
phylum,
class,
order,
family,
genus,
and
species.
 c. Kingdom,
phylum,
order,
class,
family,
genus,
and
species.
 d. Phylum,
kingdom,
order,
class,
species,
family,
and
genus.
 e. Phylum,
family,
class,
order,
kingdom,
genus,
and
species.
 
 2. Which
of
these
illustrates
the
correct
representation
of
the
binomial
 scientific
name
for
the
African
lion?
 a. Panthera
leo
 b. Panthera
leo
 c. panthera
leo
 d. Panthera
Leo
 e. Panthera
leo
 
 3. Most
Swiss
starling
(birds)
produce
four
to
five
eggs
in
each
clutch.

Those
 producing
fewer
or
more
than
this
have
reduced
fitness.

Which
of
the
 following
terms
best
describes
this?
 a. Artificial
selection
 b. Directional
selection
 c. Stabilizing
selection
 d. Disruptive
selection
 e. Sexual
selection
 
 4. In
seedcracker
finches
from
Cameroon,
small‐
and
large‐billed
birds
 specialize
in
cracking
soft
and
hard
seeds,
respectively.

If
long‐term
climatic
 change
resulted
in
all
seeds
becoming
hard,
what
type
of
selection
would
 then
operate
on
the
finch
population?
 a. Disruptive
selection
 b. Directional
selection
 c. Stabilizing
selection
 d. Sexual
selection
 e. No
selection
would
operate
 
 
 5. Structures
as
different
as
human
arms,
bat
wings,
and
dolphin
flippers
 contain
many
of
the
same
bones,
these
bones
having
developed
from
very
 similar
embryonic
tissues.

How
do
biologists
interpret
these
similarities?
 a. By
identifying
the
bones
as
being
homologous.
 b. By
identifying
the
bones
as
vestigial
organs.
 c. By
proposing
that
humans,
bats,
and
dolphins
share
a
common
ancestor.
 d. a
and
c
only
 e. All
of
the
above
 6. a. b. c. d. e. Charles
Darwin
was
the
first
person
to
propose
 that
evolution
occurs.
 A
mechanism
for
how
evolution
occurs.
 That
the
Earth
is
older
than
a
million
years.
 A
way
how
to
use
artificial
selections.
 None
of
the
above.
 
 Refer
to
the
following
information
to
answer
the
question
7
and
8.

You
are
studying
 three
populations
of
birds.

Population
A
has
ten
birds,
of
which
one
is
brown
(a
 recessive
trait)
and
nine
are
red.

Population
B
has
100
birds,
of
which
ten
are
 brown.

Population
C
has
30
birds,
and
three
of
them
are
brown.
 
 7. In
which
population
is
the
frequency
of
the
allele
for
brown
feathers
highest?
 a. Population
A
 b. Population
B
 c. Population
C
 d. They
are
all
the
same.
 e. It
is
impossible
to
tell
from
the
information
given.
 
 8. In
which
population
would
it
be
least
likely
that
an
accident
would
 significantly
alter
the
frequency
of
the
brown
allele?
 a. Population
A
 b. Population
B
 c. Population
C
 d. They
are
all
the
same.
 e. It
is
impossible
to
tell
from
the
information
given.
 
 9. Which
of
these
evolutionary
agents
is
most
consistent
at
causing
populations
 to
become
better
suited
to
their
environments
over
the
course
of
 generations?
 a. Mutation
 b. Non‐random
mating
 c. Gene
flow
 d. Natural
selection
 e. Genetic
drift
 
 10. The
theory
of
natural
selection
states
that:
 a. Some
live
and
some
die
in
each
generation.
 b. Only
the
largest
and
strongest
survive.
 c. Random
assortment
of
genes
results
in
better
characteristics
in
the
 following
generations.
 d. The
best
adapted
individuals
survive
and
reproduce,
contributing
the
 most
genes
to
the
next
generation.
 e. Individuals
that
mutate
in
response
to
their
environment
will
survive
 
 11. Two
species
of
frogs
belonging
to
the
same
genus
occasionally
mate,
but
the
 offspring
fail
to
develop
and
hatch.

What
is
the
mechanism
for
keeping
the
 two
frog
species
separate?
 a. The
postzygotic
barrier
called
hybrid
inviability.
 b. The
psotzygotic
barrier
called
hybrid
breakdown.
 c. The
prezygotic
barrier
called
hybrid
sterility.
 d. Gametic
isolation
 e. Adaptation
 
 12.
The
biological
species
concept
is
inadequate
for
grouping
 













a.
plants.
 












b.
parasites.
 












c.
asexual
organisms.
 












d.
animals
that
migrate.
 












e.
plants
that
live
at
far
north.
 
 12. Dog
breeders
maintain
the
purity
of
breeds
by
keeping
dogs
of
different
 breeds
apart
when
they
are
fertile.

This
kind
of
isolation
is
most
similar
to
 which
of
the
following
reproductive
isolating
mechanisms?
 a. behavioral.
 b. Gametic.
 c. Habitat.
 d. Tempral.
 e. Hybrid
breakdown.
 
 13. Races
of
humans
are
unlikely
to
evolve
extensive
differences
in
the
future
for
 which
of
the
following
reasons?
 I. The
environment
is
unlikely
to
change.
 II. Human
evolution
is
complete.
 III. The
human
races
are
incompletely
isolated.
 a. I
only.
 b. III
only.
 c. I
and
II
only.
 d. II
and
III
only.
 e. I,
II,
and
III
 
 14. Which
kingdom
has
been
replaced
with
two
domains?
 a. Plantae.
 b. Fungi.
 c. Protista.
 d. Animalia.
 e. Monera.
 
 
 15. Which
statement
represents
the
best
explanation
fro
the
observation
that
the
 nuclear
DNA
of
wolves
and
domestic
dogs
has
a
very
high
degree
of
 homology?
 a. Dogs
and
wolves
have
very
similar
morphologies.
 b. Dogs
and
wolves
belong
to
the
same
order.
 c. Dogs
and
wolves
belong
to
the
same
species.
 d. Dogs
and
wolves
shared
a
common
ancestor
very
recently.
 e. None
of
the
above.
 
 Define:
 
 Taxonomy:
 The
science
of
describing,
naming,
and
classifying
organisms.
 ...
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This note was uploaded on 07/12/2011 for the course GOV 365L taught by Professor Liu during the Spring '08 term at University of Texas at Austin.

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