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EVO BIO EXAM WITH COMPLETE SOLUTIONS 100% VERIFIED
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EVO BIO EXAM WITH COMPLETE SOLUTIONS 100% VERIFIEDDifferent species of finches have different shaped and sized beaks. What do these beak
differences tell us? - ANSWER Different finch beak shapes are evidence that finch
species adapted to different environments over many generations.
Genetic evidence supports which of the following explanations for the presence of 13
different finch species on the Galápagos islands? - ANSWER Many years ago, a small
population of a single finch species migrated to the islands and evolved into the current
13 species.
When Charles Darwin set sail on the HMS Beagle, what did he and most of his
contemporary scientists think was the origin of species? ANSWER Most scientists,
including Darwin, thought each species was specially created by God in its present form
and did not change over time.
Which of the following are basic components of the Hardy-Weinberg model? - ANSWER
Frequencies of two alleles in a gene pool before and after many random matings
Which of the following statements are a part of the Hardy-Weinberg principle? -
ANSWER If allele frequencies in a population are given by p and q, then genotype
frequencies will be given by p 2, 2pq, and q 2 for generation after generation.
When alleles are transmitted according to the rules of Mendelian inheritance their
frequencies do not change over time.
Even if allele A1 is dominant to allele A2, it does not increase in frequency.
true or false? The Hardy-Weinberg model makes the following assumptions: no selection
at the gene in question; no genetic drift; no gene flow; no mutation; random mating. -
ANSWER true
Which of the following evolutionary forces consistently results in adaptive changes in
allele frequencies? - ANSWER choice Selection is the only evolutionary force that
, consistently results in adaptation. Mutation without selection and genetic drift are
random processes that may result in adaptive, maladaptive or neutral effects on
populations.
Which of the following evolutionary forces could create new genetic information in a
population? - ANSWER mutation. Mutations, or changes in a cell's DNA, can introduce
new genetic information in a population.
What does the selection coefficient (s) measure? - ANSWER strength of selection
against a phenotype
evolution - ANSWER a process of descent with modification from common ancestors
descent - ANSWER cumulative transmission of genetic information across generations
change - ANSWER change in the composition of genetic information
common descent - ANSWER all life shares a history of common ancestors
evolution occurs in ____ - ANSWER populations
_____ is the only way asexual organisms can evolve - ANSWER mutation
genetic recombination - ANSWER The regrouping of genes in an offspring that results in
a genetic makeup that is different from that of the parents.
how does evolution occur - ANSWER acts on variation
-mutation is the ultimate source of variation
-genetic recombination also produces variation
how does evolution occur - ANSWER variation is sorted within a generation
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