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Bio 182 Modules 3 & 4 Questions and Answers with
Solutions UPDATED!!!
True or False? If the slope of the relationship between the
phenotype and fitness is positive, natural selection would
decrease the phenotype over generations. - ANSWER False; the
positive relationship would lead to an increase in the
phenotype over generations.
True or False? If the parameter for the squared term is negative,
natural selection will likely stabilize the phenotype at an
intermediate value. - ANSWER True; if the squared term is
negative, then selection will LIKELY stabilize (depends on how
large the parameter for a is)
Which type of selection is most common? - ANSWER
True or False? Directional selection is more likely to be weak
than strong. - ANSWER True; more cases of weak directional
selection than strong/nature tends to select very weakly.
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True or False? Stabilizing selection occurs more often than
disruptive selection. - ANSWER False; all the of these forms of
selection can happen.
True or False? Natural selection will likely eliminate deleterious
alleles more quickly with sexual reproduction than with asexual
reproduction. - ANSWER True; sex works both directions.
True or False? In a rapidly changing environment, a population
would likely benefit more from sexual reproduction than from
asexual reproduction. - ANSWER True; sex allows population to
adapt quickly and we need a lot of genetic variation.
True or False? If a parent passes one copy of each chromosome
to an offspring, alleles on the same chromosome would be
inherited together. - ANSWER True; alleles on the same
chromosome will be inherited together.
True or False? If Mendel had compared traits controlled by
genes on the same chromosome, his results would not have
matched the predictions of his model. - ANSWER
Bio 182 Modules 3 & 4 Questions and Answers with
Solutions UPDATED!!!
True or False? If the slope of the relationship between the
phenotype and fitness is positive, natural selection would
decrease the phenotype over generations. - ANSWER False; the
positive relationship would lead to an increase in the
phenotype over generations.
True or False? If the parameter for the squared term is negative,
natural selection will likely stabilize the phenotype at an
intermediate value. - ANSWER True; if the squared term is
negative, then selection will LIKELY stabilize (depends on how
large the parameter for a is)
Which type of selection is most common? - ANSWER
True or False? Directional selection is more likely to be weak
than strong. - ANSWER True; more cases of weak directional
selection than strong/nature tends to select very weakly.
, 2|Page
True or False? Stabilizing selection occurs more often than
disruptive selection. - ANSWER False; all the of these forms of
selection can happen.
True or False? Natural selection will likely eliminate deleterious
alleles more quickly with sexual reproduction than with asexual
reproduction. - ANSWER True; sex works both directions.
True or False? In a rapidly changing environment, a population
would likely benefit more from sexual reproduction than from
asexual reproduction. - ANSWER True; sex allows population to
adapt quickly and we need a lot of genetic variation.
True or False? If a parent passes one copy of each chromosome
to an offspring, alleles on the same chromosome would be
inherited together. - ANSWER True; alleles on the same
chromosome will be inherited together.
True or False? If Mendel had compared traits controlled by
genes on the same chromosome, his results would not have
matched the predictions of his model. - ANSWER
