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Biology 1108 Exams/ University Of Connecticut BIOL 1108 Exams 1-3 (answered) Spring 2022/2023
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Biology 1108 Exams/ University Of Connecticut BIOL 1108 Exams 1-3 (answered) Spring 2022/2023
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Biology 11081. In general, in a sample of n individuals, the fre- the number of occur-
quency of an allele is: rences of the allele di-
vided by
twice the number of in-
dividuals in the sample
(2n)
2. In a population of Mendel's garden peas, the True.
frequency of dominant yellow-flowered plants is
50%. The population is in Hardy-Weinberg equi-
librium. From this information alone, you can de-
termine the allele frequencies (A=p and a=q). T/F
3. If a population is not in Hardy-Weinberg equilib- evolution has occurred
rium, we can conclude that: because one of the
assumptions of the
Hardy-Weinberg equi-
librium has been violat-
ed.
4. The goldenrod gall fly lays its eggs on the ter- stabilizing selection
minal buds of goldenrod plants. Larvae chew
through the buds and into the stems, where
their saliva induces the plant to generate a gall,
or outgrowth of tissue that then provides food
and shelter for the developing larva. The larvae
are prey to both parasitoid wasps and to birds;
wasps selectively prey on larvae inside the small-
est galls while birds selectively prey on larvae in-
side the largest galls. Golden gall flies are there-
fore subject to:
5. Which big sagebrush plant is the most fit, based The individual that pro-
on the information presented? duces 3% more off-
spring each year than
others in its population.
6. On a hike through the forest, you notice a popu-
lation of 100 flowering plants that all look iden-
, Biology 1108
tical (phenotypic clones). They span an area of True.
approximately 100 square meters. You take some False.
representatives from one corner of their distrib- False.
ution back to the lab, sequence their DNA and
conclude that they are genetoc clones. T/F.
This population can evolve.
This population can only evolve through genetic
drift.
This population can only evolve through natural
selection.
7. You find that a wild population of antelope is not No, HWE does not in-
in HWE. From this information alone, can you form us as to the mech-
determine the mechanism of evolution operating anism of evolutionary
on the population? change, it only informs
us as to whether or not
evolution is happening.
8. The only evolutionary process that leads to adap- natural selection
tive change is:
9. What does it mean to say that an allele is "fixed" It is an indication of no
in the population? genetic variation at that
locus in the population.
10. Two organisms are part of the same population they are the same
if: species and are in the
same geographic area.
11. Why can't we measure genetic variation in a pop- The environment can
ulation using phenotypes? also affect the pheno-
type.
12. A snowshoe hare produces a white coat during The alleles for a white
the winter, allowing it to better hide from preda- winter coat increased
tors. White-coated hares have thrived and a ma- over time.
jority of snowshoe hares in the population now
produce white coats. Based on this, which of the
following statements are definitely true?
, Biology 1108
13. According to the BCS (Biological Species Con- they can produce fertile
cept), two individuals are members of the same offspring.
species if:
14. The intricate plumage of a male Bird of Paradise sexual selection
has become increasingly elaborate throughout
their evolution due to females mating preferen-
tially with males that display the most impressive
feathers. This is an example of:
15. If q=0.4, what is the frequency of AA? 0.36
16. Which one of the following statements correctly Cells adhere to one
described features shared by simple multicellu- another, most of the
lar eukaryotes? cells are capable of
a wide range of func-
tions, including repro-
duction; and the loss of
one or more cells usu-
ally does not lead to the
death of the organism.
17. Unlike plant cells, animal cells move during de- gastrulation
velopment. Which of the following terms de-
scribes the reorganization of undifferentiated
cells which results in the formation of an embry-
onic structure with multiple layers?
18. Which one of the following is believed to be the the increase in atmos-
major event that led to the appearance of diverse, pheric oxygen
complex multicellular organisms on Earth?
19. How can two cells of a complex multicellular Different genes are ex-
organism have the same genome, but markedly pressed in different
different structures and functions? cells.
20. A cytoskeleton enables eukaryotic cells to: move, engulf other
cells, and change
shape
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