Biol 345 Exam 2 ASU 2024/2025 Exam
Questions with Detailed Verified
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Which locus is most likely to be in linkage disequilibrium with the mutation
(all else being equal; assume a sexually reproducing organism)? -
🧠ANSWER ✔✔The one closest to the star
Which of these provides the selection pressure maintaining sexual
reproduction, according to the Red Queen hypothesis? - 🧠ANSWER
✔✔Pathogens of the sexual organism evolve to overcome the organism's
defenses.
What is the best explanation for the observation that
eukaryotes that seem superficially simple can have much larger genomes
(in terms of mass or number of base pairs) than organisms that have
complex
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,anatomy, structure, or behavior? - 🧠ANSWER ✔✔Some organisms have a
tremendous amount of noncoding DNA, like repetitive sequences.
Which mechanism for the appearance of a new gene in a species' genome
could also explain different phylogenetic tree topologies when using
different genes? - 🧠ANSWER ✔✔Horizontal gene transfer
Which event will not alter an organism's karyotype? - 🧠ANSWER
✔✔Sequence inversion
Human eyes have a very different morphology from that of fly eyes. If Pax6
sequence and function is highly conserved, how can one explain
morphological divergence in eyes and their ectopic expression in these
flies? - 🧠ANSWER ✔✔Both genes turn on eye development, but different
genes are regulated by them in different species.
Imagine a scenario in which several lakes have been
colonized by marine-origin sticklebacks. In each lake, body armor
disappears over time. Which change most likely caused this? - 🧠ANSWER
✔✔Independent, unique mutations occurred in each population that
rendered enhancers in the armor pathway useless, which were then
favored by natural selection.
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, Which observation is inconsistent with Haeckel's idea that "ontogeny
recapitulates phylogeny"? - 🧠ANSWER ✔✔The pharyngeal clefts and
branchial
arches of embryonic mammals and reptiles never acquire the form seen in
adult fish.
What is metagenomics? - 🧠ANSWER ✔✔sequencing DNA from a group of
species from the same ecosystem
Most examples of polyploidy speciation involve _______. - 🧠ANSWER
✔✔Plants
You collect individuals from different allopatric populations of a leaf-eating
beetle. In the laboratory, you conduct mate-choice experiments to assess
levels of reproductive isolation among beetles from different populations.
Assuming that ecological speciation occurred in the wild, which pattern
should you expect? - 🧠ANSWER ✔✔Less reproductive isolation among
populations that share similar habitats
Which observation does not provide evidence that sexual selection can be
an important cause of speciation? - 🧠ANSWER ✔✔In many species,
recombination rates differ for males and females.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
Questions with Detailed Verified
Answers (100% Correct Answers) |
Already Graded A+
Which locus is most likely to be in linkage disequilibrium with the mutation
(all else being equal; assume a sexually reproducing organism)? -
🧠ANSWER ✔✔The one closest to the star
Which of these provides the selection pressure maintaining sexual
reproduction, according to the Red Queen hypothesis? - 🧠ANSWER
✔✔Pathogens of the sexual organism evolve to overcome the organism's
defenses.
What is the best explanation for the observation that
eukaryotes that seem superficially simple can have much larger genomes
(in terms of mass or number of base pairs) than organisms that have
complex
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
,anatomy, structure, or behavior? - 🧠ANSWER ✔✔Some organisms have a
tremendous amount of noncoding DNA, like repetitive sequences.
Which mechanism for the appearance of a new gene in a species' genome
could also explain different phylogenetic tree topologies when using
different genes? - 🧠ANSWER ✔✔Horizontal gene transfer
Which event will not alter an organism's karyotype? - 🧠ANSWER
✔✔Sequence inversion
Human eyes have a very different morphology from that of fly eyes. If Pax6
sequence and function is highly conserved, how can one explain
morphological divergence in eyes and their ectopic expression in these
flies? - 🧠ANSWER ✔✔Both genes turn on eye development, but different
genes are regulated by them in different species.
Imagine a scenario in which several lakes have been
colonized by marine-origin sticklebacks. In each lake, body armor
disappears over time. Which change most likely caused this? - 🧠ANSWER
✔✔Independent, unique mutations occurred in each population that
rendered enhancers in the armor pathway useless, which were then
favored by natural selection.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, Which observation is inconsistent with Haeckel's idea that "ontogeny
recapitulates phylogeny"? - 🧠ANSWER ✔✔The pharyngeal clefts and
branchial
arches of embryonic mammals and reptiles never acquire the form seen in
adult fish.
What is metagenomics? - 🧠ANSWER ✔✔sequencing DNA from a group of
species from the same ecosystem
Most examples of polyploidy speciation involve _______. - 🧠ANSWER
✔✔Plants
You collect individuals from different allopatric populations of a leaf-eating
beetle. In the laboratory, you conduct mate-choice experiments to assess
levels of reproductive isolation among beetles from different populations.
Assuming that ecological speciation occurred in the wild, which pattern
should you expect? - 🧠ANSWER ✔✔Less reproductive isolation among
populations that share similar habitats
Which observation does not provide evidence that sexual selection can be
an important cause of speciation? - 🧠ANSWER ✔✔In many species,
recombination rates differ for males and females.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
