Biology 1407: Lecture Exam 1 Questions and Answers
Question 1.
3 and 4
Correct Answer: In the phylogenetic trees, numbers represent species, and the
same species are shown in both trees. *Which two species are represented as
sister species in Tree 2 but are not shown as sister species in Tree 1?*
Question 2.
random mating
Correct Answer: If individuals tend to mate within a subset of the population,
there is ________
Question 3.
gene flow
Correct Answer: When fisheries managers move fish from one lake to another,
this MOST LIKELY results in which of the following microevolutionary
mechanisms?
Question 4.
genetic drift
Correct Answer: Which Hardy-Weinberg condition is affected by population size?
Question 5.
heterozygotes have two alleles
Correct Answer: In the formula for determining a population's genotype
frequencies, the " pq" in the term 2pq is necessary because ________
Page 1
, Question 6.
V is most closely related to species W.
Correct Answer: The questions below refer to the following evolutionary tree, in
which the horizontal axis represents time (present time is on the far right) and
the vertical axis represents morphological change. *Which species is most
closely related to species W?*
Question 7.
at least one gene, affecting one reproductive barrier, must change
Correct Answer: According to the biological species concept, for speciation to
occur, ________.
Question 8.
changes in allele frequencies in a population occur over generations
Correct Answer: Microevolutions occur when ________.
Question 9.
Ernst Mayr
Correct Answer: The person who developed the Biological Species Concept (BSC)
was who?
Question 10.
small populations
Correct Answer: Which one of the following conditions would allow gene
frequencies to change by chance?
Question 11.
Allopatric Speciation
Correct Answer: ....................involves a geographic barrier that physically
separates the two potential (incipient) group of specie
Question 12.
gene flow
Correct Answer: Over time, the movement of people on Earth has steadily
increased. This has altered the course of human evolution by increasing ________.
Page 2
Question 1.
3 and 4
Correct Answer: In the phylogenetic trees, numbers represent species, and the
same species are shown in both trees. *Which two species are represented as
sister species in Tree 2 but are not shown as sister species in Tree 1?*
Question 2.
random mating
Correct Answer: If individuals tend to mate within a subset of the population,
there is ________
Question 3.
gene flow
Correct Answer: When fisheries managers move fish from one lake to another,
this MOST LIKELY results in which of the following microevolutionary
mechanisms?
Question 4.
genetic drift
Correct Answer: Which Hardy-Weinberg condition is affected by population size?
Question 5.
heterozygotes have two alleles
Correct Answer: In the formula for determining a population's genotype
frequencies, the " pq" in the term 2pq is necessary because ________
Page 1
, Question 6.
V is most closely related to species W.
Correct Answer: The questions below refer to the following evolutionary tree, in
which the horizontal axis represents time (present time is on the far right) and
the vertical axis represents morphological change. *Which species is most
closely related to species W?*
Question 7.
at least one gene, affecting one reproductive barrier, must change
Correct Answer: According to the biological species concept, for speciation to
occur, ________.
Question 8.
changes in allele frequencies in a population occur over generations
Correct Answer: Microevolutions occur when ________.
Question 9.
Ernst Mayr
Correct Answer: The person who developed the Biological Species Concept (BSC)
was who?
Question 10.
small populations
Correct Answer: Which one of the following conditions would allow gene
frequencies to change by chance?
Question 11.
Allopatric Speciation
Correct Answer: ....................involves a geographic barrier that physically
separates the two potential (incipient) group of specie
Question 12.
gene flow
Correct Answer: Over time, the movement of people on Earth has steadily
increased. This has altered the course of human evolution by increasing ________.
Page 2
